Digital currency EIS

1. Return the result of ifconfig
eth0 to awk for processing
where - F & # 39;:|< br />+'
this is a separator defined by awk and then matched with "BCAST & quot;, Take the content of the fourth column
since your command is not universal, you can't output the result here, but you should intercept the broadcast address

2. What is bitcoin? What's the use of Internet? On the evening of the 12th, the computer blackmail worm named "eternal blue" broke out on a large scale in the world. It is said that "eternal blue" has spread to more than 100 countries, including Europe, the United States, China, etc. according to incomplete statistics, there are more than 1 million computers in the world, most of which are local area networks of universities and scientific research institutions. It is estimated that in the past 24 hours, about 150000 people have paid ransom to hackers through bitcoin trading platform. If this estimation is reliable, the amount of bitcoin that hackers have obtained is about 600 million yuan. If there is no accident, more people will pay ransom in the future. The amount of blackmail is estimated to be more than 10 billion! First of all, bitcoin does not belong to any country, indivial or organization. It is an uncontrolled and decentralized currency. Kun Peng made a search on it. In fact, bitcoin has been used as ransom in the early years. The method has not changed much. It's all encryption and blackmail. The person in charge of F-Secure, a network security company, once said that the encryption and blackmail software has become their biggest headache. Once the computer is infected, not only the hard disk drive is encrypted, but every file will be invaded. Although such incidents have emerged one after another in the past, it's only that they didn't have as much impact in the past as this one. Besides, people like to forget most, so they are not well known and it's normal. For example, around 2013, hackers began to extort bitcoin by illegally encrypting users' PC data and personal information. In 2014, an Australian executive was harassed by hackers after he paid $14000 worth of bitcoin ransom for malware under the pressure of online hackers. In 2015, hackers launched a third cyber attack on three Greek banks and demanded 20000 bitcoins (worth 7 million euros) as ransom from each of them. In 2015, the police department in tuxbury, Massachusetts, was attacked by hackers, resulting in the computer unable to log in. In order to prevent the loss of important data, the police station finally paid 500 bitcoin "ransom" as required by hackers. In 2016, a hacker hijacked the network of the Hollywood Presbyterian Memorial Medical Center through software, paralyzing the operation of the hospital. The hospital decided to pay 40 bitcoins, equivalent to about 17000 US dollars, as a "ransom" to the hacker Kunpeng believes that hackers choose bitcoin mainly because it has the characteristics of decentralization, globalization and anonymity like the Internet. Transferring bitcoin to the other side of the earth is as simple, low-cost and unlimited as sending e-mail. Bitcoin is therefore used in cross-border trade, payment, remittance and other fields. Moreover, bitcoin can be used to cash, which can be converted into the currency of most countries. Bitcoin investors generally believe that the reason why hackers choose bitcoin to pay ransom is that bitcoin not only has advantages over other traditional payment tools, but also is the best choice among other virtual currencies. Firstly, bitcoin has certain anonymity, which is convenient for hackers to hide their identities; Secondly, it is not subject to geographical restrictions and can collect money on a global scale; At the same time, bitcoin also has the characteristics of "decentralization", which allows hackers to automatically process the ransom of victims through programs. With the technical support of the network, the manufacture and issuance of bitcoin are not based on the trust of the central issuing institution, and the operations such as transfer and other transactions do not even need names. That is to say, to collect money with bitcoin, you don't need to open an account in the real name of a financial institution, and you don't need to go through any third-party institutions, such as the third-party payment that we use most at present. You just need to download and register an independent bitcoin wallet. If what the criminal extorts this time is not bitcoin, US dollars or other currencies, and what the criminal gives is not a bitcoin wallet address, but a collection account of a bank, the hacker may have been locked or arrested before receiving the money. Now you know, anyway, I don't need bitcoin. Please pay more attention

3. Natural environment
mountain
the highest mountain: Mount Qomolangma (8844.43 m above sea level)
the highest peak from the bottom to the top of the structure: Mauna Kea, Hawaii Island, 4205 m above sea level, 5998 m below sea level, with a total height of 10203 m
the largest mountain and volcano on earth: Mauna Loa, Hawaii Island, The highest active volcano on the earth: Ojos del Salado (6893 meters above sea level)
the highest peak on the island: Puncak Jaya, New Guinea, 4884 m above sea level)
the highest and largest known mountain and volcano in the solar system: Olympus volcano (Mars, up to 27 km)
the longest land range: Andes (up to 7500 km)
The Longest Undersea range: mid ocean ridge (up to 80000 km)
the lowest volcano: Lishan Mountain, Japan, 112 meters above sea level)

islands
the largest island: Greenland (with an area of 2166086 square kilometers)
the largest island in the river: Bananal Island (Tocantins, Brazil, with an area of 20000 square kilometers)
the largest island in the lake: Manitoulin Island, Lake Huron, with an area of 2, 766 square kilometers)
the largest island in the lake: Samosir, Lake Toba, Sumatra, with an area of 520 square kilometers)
the largest crater like island in the lake: Ren é- Levasseur Island, Quebec, Canada, with an area of 2020 square kilometers)
the largest Sandy Island: fenser Island (Queensland, Australia, with an area of 1630 square kilometers)
the largest island completely surrounded by fresh water: Marriott Island (Amazon estuary, Brazil, with an area of 40 square kilometers), The largest estuarine alluvial island and the largest sand island: Chongming Island (with an area of more than 1200 square kilometers)
the highest lying Island: New Guinea Island (with an altitude of 4884 meters of Chaya peak)
the most populous Island: Java Island (with a population of 124 million)
the highest population density Island: yalaizhou Island (with a population density of 68 per square kilometer),
largest archipelago: Malay Archipelago (composed of more than 13000 islands in Indonesia and more than 7000 islands in the Philippines)
largest peninsula: Arabian Peninsula (with an area of about 3 million square kilometers)
largest coral reef group: Great Barrier Reef

Lake
largest lake and Salt Lake: Caspian Sea (with an area of 371 square kilometers), The largest fresh water lake: Lake Superior (North America, covering an area of 82400 square kilometers)
the largest artificial lake and reservoir: Walter reservoir (Ghana, covering an area of 8502 square kilometers)
the largest lake in the lake: Lake manitu (Lake Huron, It covers an area of 104 square kilometers)
the deepest lake and fresh water lake: Baikal Lake (water depth of 1940 meters)
the deepest salt water lake: Dead Sea (water depth of 330 meters)
the highest lake and salt water lake: Namco Lake (4718 meters above sea level)
the highest fresh water lake: mafamuco Lake (4 meters above sea level),
the lowest Lake: Dead Sea (the lake is 418 meters above sea level, which is the lowest point that has been exposed to the land)
the highest lake and fresh water lake: dikaka Lake (the lake is 3821 meters above sea level)
the saltiest lake: Dead Sea (the salinity of the lake reaches 300 ‰, The oldest lake: Lake Baikal (which has existed on earth for more than 25 million years)
lakes with the largest storage capacity, inland lakes and salt lakes: Caspian Sea (with a volume of 78200 cubic kilometers)
freshwater lake with the largest storage capacity: Lake Baikal (with a volume of 23,
the artificial lake with the largest water storage capacity: Bratsk reservoir (Russia, 169 cubic kilometers)
the asphalt lake with the largest asphalt storage capacity: Lake Pichi (Trinidad and Tobago, 0.4 square kilometers, 12 million tons of asphalt)< The largest group of freshwater lakes: the Great Lakes of North America (with a total area of 245000 square kilometers)

rivers
the longest river: Nile (with a total length of 6695 kilometers)
the longest river: Volga (with a total length of 3690 kilometers in Europe)
the shortest River: roe River, Montana, USA, The river with the largest drainage area is Amazon River (with an area of 6915000 square kilometers)
the river with the largest flow is Amazon River (with a flow of 222440 cubic meters per second), It accounts for 20% of the world's river flow.
the river with the highest sediment concentration: the Yellow River (the highest sediment concentration was 920 kg / m3 in 1977)
the river flowing through the most countries: the Danube River (18 countries from Western Europe to Eastern Europe)
the longest canal: the Beijing Hangzhou Grand Canal (1, 794 km)
the earliest canal: the ancient Suez Canal (built in the 19th century BC, completed in 500 BC, abandoned in the 8th century and rebuilt in the 19th century.)< The longest river with the highest altitude: Yarlung Zangbo River (the average elevation of riverbed is over 3000 meters)

Ocean
the largest ocean: Pacific Ocean (with an area of 155.557 million square kilometers)
the deepest ocean: Pacific Ocean (with the deepest Mariana Trench as deep as 11034 meters)
the smallest Ocean: Arctic Ocean (with an area of 1, 4.056 million square kilometers)
the largest sea: Coral Sea (4.791 million square kilometers)
the deepest sea: new hebry trench (9175 meters in depth)
the smallest sea: Marmara Sea (11350 square kilometers)
the shallowest sea: Azov Sea (13 meters in average depth), The deepest is only 15.3m)
the most salty sea: the Red Sea (the salinity in the north is 42 ‰, much higher than the world's Quasi average salinity of 35 ‰)
the weakest sea: the Baltic Sea (the salinity is only 7-8 ‰, and the salinity in each bay is lower, only 2%)
the sea with the most islands: the Aegean Sea (with seven islands, a total of 2 Islands), 500 Islands)
the oldest sea: Mediterranean Sea
the sea with the least living creatures: Black Sea
the sea with the most coastal countries: Caribbean Sea

plateau
the largest Plateau: Brazil plateau (area about 4 million square kilometers)
the highest altitude: Qinghai Tibet Plateau (average altitude 4000 meters)
the largest aeolian Plateau: loess Plateau

Canyon
the largest canyon on the earth: Yarlung Zangbo Grand Canyon (Yarlung Zangbo River in Asia, 496.3 km long)
the deepest canyon on the earth: Yarlung Zangbo Grand Canyon (average depth 5000 m)
the largest canyon known in the solar system: Valles Marineris, Mars, 4500 km long, 200 km wide,
the longest Grand Canyon: Nujiang Grand Canyon (more than 600 kilometers in total length)
the largest rift zone: East African Rift Valley (more than 6500 kilometers in total length, equivalent to 1 / 6 of the earth's circumference, known as "the biggest scar on the earth")

Strait
the narrowest Strait: tuyuan Strait, Japan, Only 9.93m apart)
the widest channel: Drake Passage (965km wide)
the longest channel: Mozambique channel (1670km long, 1760km long, between Mozambique and Madagascar in southeast Africa)
the narrowest navigable channel: Greece, 40m long, between epuya and the European continent<

waterfall
the largest waterfall: anher Waterfall (with a drop of 979.6 meters)
the widest waterfall: Iguazu Waterfall (with a total width of 4 kilometers)
the most famous waterfall: niagara waterfall (located in the middle of Niagara River at the junction of Canada and the United States, known as one of the seven wonders in the world, Together with Iguazu falls in South America and Victoria Falls in Africa, they are called the world's three major waterfalls, Located in Congo, Africa, the largest man-made waterfall is "Jiutian Yinhe" waterfall on Lijiang River
the cleanest waterfall is Jiuzhaigou waterfall
the loudest waterfall is Victoria Waterfall (located on the border of Zambia and Zimbabwe in southern Africa), At the junction of the upper and middle reaches of the Zambezi River,

desert,
the largest desert: Sahara Desert (with an area of more than 8 million square kilometers)
the highest desert: Badain Jaran Desert (with a general altitude of 1200-1500 meters)

plain,
the largest plain: Amazon plain (more than 5.6 million square kilometers)
the coldest plain: Siberian Plain (mean temperature - 45 degrees, The lowest is - 71 degrees)

basin
the largest basin: Congo Basin
the lowest basin: Turpan Basin

cave
the largest cave: Tenglong Cave (total area 156 square kilometers)
the longest cave: Mammoth Cave (total length more than 240 kilometers)
the deepest Cave: Berna Cave (deep into the surface more than 1500 meters)
< br/ >Astronomical research
the earliest record of Halley's comet in the world (currently recognized): historical records of Qin Shihuang in China
the earliest record of Halley's comet in the world (later discovered, More than 400 years ago in historical records: the earliest record of solar eclipse in China's Huainanzi Bing luexun; the earliest record of meteor shower in the world recorded in the oracle bone inscriptions of the Shang Dynasty; the earliest record of sunspot in the world recorded in China's Zhushu Ji Nian Tong Jian; the earliest record of sunspot in the world recorded in China's Hanshu Wu Xing Zhi R / > the world's oldest star map: Dunhuang star map of Dunhuang Mogao Grottoes
the world's earliest Observatory prototype: Stonehenge in England

astronomical instruments
the world's largest solar clock: Augustus solar clock
the world's first large-scale astronomical instrument powered by water: armillary sphere
the world's oldest astronomical clock: water transport Observatory < br />The world's first telescope: Galileo telescope
the world's largest mobile radio telescope: Green Bank telescope
the world's largest optical instrument: Space Telescope

Star
the brightest star: Sirius a
the nearest star to the solar system: nearest neighbor star
the brightest supernova: Taurus supernova Star
the largest star: three red and very bright stars discovered by US astronomers in January 2005
the most attractive Star: black hole
the oldest Star: white dwarf

planet
the smallest and coldest Planet: Pluto (the name of nine planets was deleted in 2006)
the largest and fastest Planet: Jupiter
the most moons Planet: Jupiter
planet nearest to earth: Venus
brightest planet seen by naked eye: Venus
the first calculated Planet: Neptune

satellite
the largest satellite in the solar system: Ganymede
the most peculiar satellite: Triton

4. 1. The equator is the longest latitude on the earth
2. The largest land on the earth is Eurasian continent
3. The continent with the lowest altitude in the world is Europe, about 300 meters
4. Antarctica is covered by thick ice and snow, with an average altitude of more than 2000 meters, which is the highest continent in the world
5. China's plantation area ranks first in the world
6. Japan is the largest land reclamation country in the world
7. Southeast Asia is the most concentrated area of overseas Chinese
8. India is the largest country in South Asia and the largest country in Asia< 9. Indonesia has the largest number of volcanic earthquakes in the world
10. The altitude of the dead sea lake is - 400 meters, which is the lowest point of the world's land surface< The largest desert in the world is the Sahara desert
12. West Asia and North Africa are the regions with the largest oil reserves and the largest oil proction and export in the world
13. With a total length of more than 6600 km, the Nile is the longest river in the world. Cairo, the capital of Egypt, is the most populous city in the Arab countries. Alexandria is an important seaport of Egypt on the Mediterranean Sea< Sub Saharan Africa is the home of black people in the world. Kilimanjaro Mountain is the highest peak in Africa and the largest lake in Africa, Lake Victoria
15. The output of gold and diamond in Africa ranks first in the world. South Africa is the country that proces the most gold, Guinea is the country that proces the most bauxite, and Zambia is an important country that proces copper
Africa's natural population growth rate ranks first among all continents in the world
17. The most common river in Europe is Danube
18. Germany is the most powerful country in Europe
19. Russia is the largest country in the world
20. Lake Baikal in Russia is located in Siberia, with a maximum depth of more than 1600 meters. It is the deepest lake in the world
21. Lake Superior is the largest freshwater lake in the world, and the Great Lakes are the largest group of freshwater lakes in the world
22. The country that proces the most agricultural procts in the world is the United States
23. New York is the largest instrial and commercial center and port along the Atlantic coast. San Francisco and Los Angeles are the most Chinese cities in the United States
24. The Andes in South America is the longest mountain in the world, with a vertical distance of 9000 km from north to south
25. The Amazon plain of South America is the largest plain in the world, the Brazilian plateau is the largest plateau in the world, and South America has the largest tropical rain forest climate zone in the world
26. Argentina's beef export ranks first in the world. Brazil is the largest and most populous country in Latin America
27. The Amazon River is the largest river with the largest water volume and the widest drainage area in the world, with a length of 6400 km, ranking the second in the world, next only to the Nile River, and its flow capacity is more than 50 times that of the Nile River< The Amazon River Basin is covered with the largest tropical rain forest on the earth
29. At present, among Brazil's agricultural procts, coffee, sugarcane, banana and sisal account for the first place in the world< Oceania is the smallest continent in the world

5. The lowest point of land - the surface of the dead sea of Jordan. 392 m below the Mediterranean Sea
the deepest depth of the ocean - Mariana Trench (Pacific) is located in the Pacific Ocean - 11034 m
the largest ocean - Pacific 179.68 million square kilometers
the largest sea - Coral Sea (Pacific) 4.79 million square kilometers
the largest archipelago - Malay Islands (Asia) 2.43 million square kilometers
the largest island - Greenland (North America) 2.18 million square kilometers
the largest peninsula - Arabian Peninsula (Asia) 3 million square kilometers
the largest Bay - the bay of Bengal in the Indian Ocean (Asia) 2.17 million square kilometers
the longest mountain system - Cordillera mountain system (South America) 15000 kilometers
the highest peak - Mount Everest (Asia) 8848 meters
the largest plateau - Brazil plateau (South America) The highest plateau - Qinghai Tibet Plateau (Asia) has an average altitude of 4500 meters
the largest plain - Amazon plain (South America) has an area of 5.6 million square kilometers
the largest basin - Congo Basin (Africa) has an area of 3.37 million square kilometers
the largest Delta - Ganges delta (Asia) has an area of 80000 square kilometers
the largest desert - Sahara Desert (Africa) 77 70000 square kilometers
the longest Rift Valley - East African Rift Valley (Africa)
the longest river - Nile River (Africa)
the largest lake - Caspian Sea (Asia and Europe)
370000 square kilometers
the deepest lake - Lake Baikal (Asia)
1620 meters deep
the longest river - Jinghang Canal (China) 1800 kilometers
the largest freshwater lake group - Great Lakes (North America) With a total area of 245000 square kilometers
the widest waterfall - Iguazu Waterfall (South America) is 4000 meters wide
the highest waterfall - anher Waterfall (South America) is 979 meters high
the smallest sea - Marmara Sea (between Asia and Europe) covers an area of 11000 square meters
the shallowest sea - Azov Sea (Europe) is the deepest 14 meters
the most transparent sea - Sargasso Sea (North China Sea) The transparency of the Sargasso Sea can reach 72 meters
the youngest sea, the Red Sea (40 million years old)
the only sea without coast, the Sargasso Sea, is generally limited to the oval sea area surrounded by the Gulf Stream and willows, There are more than 20 countries along the coast of the Caribbean Sea (America), the sea with the largest number of islands
Aegean Sea (Mediterranean Sea)
the largest land sea - the Caribbean Sea (area of 2.75 million square kilometers)
the archipelago with the largest number of countries and regions - the West Indies (America), Diomedes is the only archipelago belonging to two continents The Bering Strait belongs to Asia (Russia) and North America (the United States)
New Guinea (Oceania), the largest island of the two countries, belongs to Indonesia and Papua New Guinea
Kalimantan (Asia), the only island of the three countries, belongs to Indonesia Malaysia and Brunei
the longest channel, the channel of Mozambique (Africa), is 1670 km long
the most important intercontinental channel, the Strait of Malacca (Pacific Ocean, Indian Ocean), Asia, Africa, and the Pacific Ocean The largest coral reef in Europe, the Great Barrier Reef (Australia), has a total area of 210000 square kilometers, There are more than 50 peaks above 7000 meters)
Etna volcano (Italy), the most active volcano, has erupted about 130-210 times since 1500 BC
ASU mountain (Japan), the largest crater, has a circumference of 100 km
the longest river gorge, Colorado Gorge (USA), is 350 km long
Hutiao Gorge (China), the deepest river gorge 2500-3000 m
the longest cave Mammoth Cave (USA) has a total length of 240 km
the largest subterranean sea - Sahara Desert (Africa) with underground water storage of 4.6 million square kilometers
the river that flows through the most countries - Danube (Europe) 9 countries
the river with the most sediment content - Yellow River (China)
Suez, the international peer canal with the largest freight volume Canal (Africa)
the largest sea trace Lake - Caspian Sea
the largest lake in the lake - manitulin Lake (North America) is located on manitulin Island, an island in Lake Huron, with an area of 100 square kilometers
it belongs to the largest lake in the country - Caspian Sea (five countries)
the highest, The largest group of plateau lakes - Qinghai Tibet Plateau (total area of 37549 square kilometers)
known as the world's rain pole - India's kilapenqi. The annual precipitation in 1861 was 20447mm
the Atacama Desert in Chile, the world's dry pole. There was no rain from 1845 to 1936
the extreme maximum temperature of Basra (Iraq) on July 8, 1991 was 58.8 ℃
the extreme minimum temperature of Antarctica on July 21, 1983 was 89.2 ℃
the average annual wind speed of Adel (Antarctica) was 19.4 meters, It is equivalent to the largest country with an area of 17.07 million square kilometers in Russia (Europe)
the smallest country with an area of 0.44 square kilometers in Vatican (Europe)
the largest inland country with an area of 2.7173 million square kilometers in Kazakhstan (Asia)
the nation with the largest population - the Han nationality in China (Asia)
the country with the highest population density - Morocco The largest sea is Coral Sea (more than 4.79 million square kilometers), followed by Arabian Sea and South China Sea
the smallest sea is Marmara Sea, followed by Azov Sea and Bohai Sea
the highest salinity sea is red sea, It is also the youngest sea
the lowest salinity sea: the Baltic Sea
the only sea without coastline: the Sargasso Sea
the sea with the most islands: the Aegean Sea
the most famous tidal bore: the Qiantang River tide
the largest ocean: the Pacific Ocean, the deepest ocean, the highest water temperature, the largest ocean with the most manganese noles
the smallest Ocean: the Arctic Ocean, the busiest ocean for shipping: the Atlantic Ocean (why?)
the largest ocean current: Westerly drift, also the largest cold current
the largest warm current: Mexican warm current
the largest archipelago: Malay islands
the highest Island: New Guinea, also the largest island belonging to two countries
the only island belonging to three countries: Kalimantan island
the longest Strait: Mozambique Strait
the deepest Strait: Drake Strait, It is also the widest channel
the most tortuous channel: Magellan channel
the channel with the most ships passing through: English Channel
the channel with the busiest oil transportation: Hormuz channel
the largest Gulf: Bay of Bengal, Gulf of Mexico, The Gulf of Guinea is followed by the deepest trench: Mariana Trench 11034
the largest coral reef: the Great Barrier Reef
the longest mountain system: Cordillera mountain system
the highest peak: Mount Everest
the volcano with the most eruptions: Mount Etna
the volcano with the most complete outline: Mount maroon, followed by Mount Fuji
the largest Plateau: Brazil plateau (more than 5 million square kilometers)

6. Three Gorges, the world's largest hydropower station
Mount Everest, the world's highest mountain
the world's largest meteorite, China's JILIN METEORITE rain No.1
in the spring and Autumn period, the earliest, longest and widest road in China was 212 BC
the world's oldest astronomical clock was born in China
1 Qiu Sunwu's art of war
2. The dictionary with the largest number of words is Kangxi dictionary of Qing Dynasty
3. The earliest newspaper is Di Bao of Western Han Dynasty
4. The earliest biographical literature is historical records of Western Han Dynasty
5. The earliest collection of excellent poems is the book of songs of spring and Autumn Period
6. The longest historical masterpiece is Confucius' spring and Autumn Period
7 The longest grotto gallery is Mogao Grottoes in Dunhuang
10. The largest inland basin is Tarim Basin
11. The earliest three-dimensional map is Shi Qidan Tu by Shen Kuo in Song Dynasty
12. The largest square is Tian'anmen Square in Beijing
the mammals living in the highest area in the world are Yaks in Tibet, China, Yaks can climb more than 6100 meters of gaohuangyuan< The oldest tree species in the world is ginkgo biloba in China, which first appeared in the Jurassic period 160 million years ago
Lhasa, the capital of Tibet, is the tallest city in the world
the oldest clock in the world is a mechanical clock made in 725 BC in China< The shovel shaped coins of Zhou Dynasty in China are the earliest metal coins in the world, dating back to 770 BC
among the banknotes issued in the world up to now, the largest is the consistent banknote issued in Ming Dynasty, with a face width of 22.86
cm and a length of 33.02 cm
the largest stamp in the world is the special stamp "China Express stamps" issued by China in 1913. The stamp is 24.8 cm long and 7 cm wide
the highest tower in the world is the Liuhe tower in Hangzhou, China
the oldest flag in the world is a flag in 500 BC. It was discovered from the tomb of a princess in Changsha, Hunan Province, China
Chinese is the most spoken language in the world, with nearly 700 million people
the earliest and largest online book in the world is Yongle Encyclopedia of Ming Dynasty in China, with a total of 22937 volumes, compiled by 2000 scholars in 1403-1408
the most common surname in the world is "Zhang", accounting for 9.7% to 12.1% of China's total population. According to the lowest estimate, there are about 100 million people. If a "country" is formed, its population will be the eighth in the world
the largest meteorite in the world, JILIN METEORITE No.1, fell on March 8, 1976, weighing 1770 kg
twelve Chinese acrobats performed on a bicycle, creating a world record for the most riders on a bicycle
1. The world's longest wall the great wall of China
2. The silk road is the oldest trade channel between East and West in the world
3. The stone city of Nanjing in Ming Dynasty is the largest city wall in the world
4. The world's tallest sign tower of Tropic of cancer, the sign tower of Tropic of cancer in Conghua, Guangdong
5. Huma County, Heilongjiang Province, is the northernmost rice growing area in the world
6. Qiantang River tide, the most famous tide in the world
7. The world's largest meteorite rain and meteorite fall in Jilin Province
8. Guangxi Lingqu, the world's driest sluice canal< 9. Beijing Hangzhou Grand Canal, the longest canal in the world
10. The Yellow River is the largest sediment concentration River in the world< The Yarlung Zangbo River is the highest River in the world
12. Namco Lake in Tibet is the highest salt lake in the world
13. Himalayas, the highest mountain in the world
14. Tibet is the highest agricultural planting area in the world
15. Taklimakan desert is the desert with the largest percentage of mobile ne area in the world
16. Turpan Basin is the lowest basin in the world
17. The largest elevation difference of land surface in the world - Mount Everest (8844.43) and lake aiding (155m)
18. Guangxi, Guizhou and eastern Yunnan are the most developed lava landforms in the world
19. China's Loess Plateau is the largest loess landform in the world
20. Qinghai Tibet Plateau, the highest and youngest plateau in the world
21. Mount Everest is the thinnest place in the world
22. Northern Tibet Plateau is the highest and largest distribution area of plateau lakes in the world<
1.
the earliest book of war is Sun Tzu's art of war by Sun Wu in the spring and Autumn Period
2. The dictionary with the largest number of words is Kangxi dictionary of the Qing Dynasty
3. The earliest newspaper is Di Bao of the Western Han Dynasty
4. The earliest biographical literature is historical records of the Western Han Dynasty
5. The earliest collection of excellent poems is the book of songs of the spring and Autumn Period
6 R / > 7. The largest imperial palace in the world is the Forbidden City in Beijing
8. The highest palace is the Potala Palace
9. The longest grotto gallery is the Mogao Grottoes in Dunhuang
10. The largest inland basin is the Tarim Basin
11. The earliest three-dimensional map is Shi Qidan Tu by Shen Kuo in Song Dynasty
12. The largest square is Tiananmen Square in Beijing
1. The earliest book of war is Sun Tzu by Sun Wu in spring and autumn Art of war
2. The dictionary with the most words is Kangxi dictionary of Qing Dynasty
3. The earliest newspaper is Diebao of Western Han Dynasty
4. The earliest biographical literature is Shiji of Western Han Dynasty
5. The earliest excellent poetry collection is Shijing of Chunqiu
6. The longest historical masterpiece is Chunqiu of Confucius
7. The largest imperial palace in the world is the Forbidden City of Beijing
8 The tallest palace is Potala Palace
9. The longest grotto gallery is Dunhuang Mogao Grottoes
10. The largest inland basin is Tarim Basin
11. The earliest three-dimensional map is the map of making Khitan drawn by Shen Kuo in Song Dynasty
12. The world's largest water conservancy project, the Three Gorges Project
13. The highest peak, Mount Everest
14. The world's largest mountain range, Himalayas< The highest plateau in the world: Qinghai Tibet Plateau
16. The most popular language in the world: Chinese
17. The most neighboring country in the world: China (21)
18. The highest elevation basin in the world: Qaidam Basin
19. The longest artificial canal in the world: Beijing Hangzhou Grand Canal
20. The highest elevation Lake in the world: kashun Lake
21. The highest camphor proction area in the world: Taiwan
22 The largest distribution area of loess in the world: Loess Plateau
24. The largest distribution area of plateau lakes in the world: Qinghai Tibet Plateau

7. good /gud/ adj. 好的
morning /'mɔ:niŋ/ n. 早晨上午
Good morning! 早上好
hi /hai/ interj. (用于打招呼)嗨喂
hello /hə'ləu/ interj. 你好喂
afternoon /,a:ftə'nu:n/ n. 下午
Good afternoon! 下午好
evening /'i:vniŋ/ n. 晚上傍晚
Good evening! 晚上好
how /hau/ adv. 怎样如何
are /a:/ v. 是
you /ju:/ pron. 你你们
How are you? 你好吗
I /ai/ pron. 我
am /æm/ v. 是
fine /fain/ adj. 健康的美好的
thanks /θæŋks/ interj.&n. 感谢谢谢
OK /əu'kei/ interj.& adv. 好可以

8. The significance of the research on the organization of e-commerce management technology -- e-commerce represents a new management mode, which has a strong impact on the traditional management mode both in depth and breadth, and has brought severe challenges to the traditional management theory and method, but also provides opportunities for the development of new management technology. According to the current research situation of e-commerce, there are more scattered and applied researches, but less systematic and theoretical researches; There are many researches from the perspectives of network technology and transaction environment, but few researches from the perspective of management mode reform, especially from the perspective of the interaction between management technology and e-commerce development. There is no comprehensive and systematic management mode under e-commerce environment suitable for China's national conditions. At present, China's enterprise management is extensive, has obvious instry personality characteristics, and the level of enterprise informatization is low. Enterprises need their own personalized e-commerce solutions and enterprise management mode, rather than simply ing mechanically. Chinese enterprises can only start from their own technical conditions, capital situation, business characteristics, economic environment and other aspects, comprehensively consider and use information technology and modern management technology to study the management theories and methods of Chinese enterprises in the e-commerce environment. E-commerce promotes the reform of enterprise management theory and method. The development and reform of enterprise management theory and method lays the foundation for the successful implementation and utilization of e-commerce. The relationship between the two is interactive. Therefore, it is of great theoretical value and practical significance to study the management mode under the e-commerce environment. Research status e-commerce has a great impact on traditional business because of its convenience and rapidity, and it has become a new trend in the field of world business. According to the estimation of relevant UN agencies, the sales volume of global e-commerce will reach 350 billion US dollars in 2000 and exceed 1 trillion US dollars in 2002. In the information technology of emerging digital economy published in 1999, the US Secretary of Commerce said: & quot; The rapid development of e-commerce shows that it will be the engine of the whole economic growth in the 21st century;. In this context, the in-depth study of the management mode under the e-commerce environment is the knowledge base to promote the further development of e-commerce. Economists believe that the network is a complex social and economic organization form that goes beyond the traditional dichotomy of market and enterprise, and thus forms the enterprise network theory. In the book the economics of electronic commerce, Whinston, a famous American information system expert, emphasizes the influence of business operation mode on e-commerce, examines the network economy and e-market from an integrated point of view, and systematically analyzes the static and dynamic pricing, utility, business strategy, and e-commerce environment from the perspective of economic management In 2000, they completed the Internet Economy: technology and practice, which discussed the network economy and its value characteristics, e-commerce technology, online market mechanism, auction and negotiation mechanism, knowledge-based procts and services, and digital management from a strategic perspective. There are also many experts who have studied the problems related to customer service, market creation, introction of new procts and new technologies, and business transformation in e-commerce community, and discussed how to establish the community relationship between enterprises and between enterprises and customers. From the perspective of modern enterprise management application, the original hierarchical structure of commercial enterprises has become a flat structure through the computer network. Enterprise leaders can directly carry out comprehensive management through the network, and complete comprehensive coordination and control, so as to speed up the turnover of goods and funds, improve the inventory structure of goods, improve the quality of procts, and improve the quality of procts Improve the efficiency of commercial circulation and the scientific management level of enterprises, so that enterprises can better adapt to the needs of market competition. From the perspective of management connotation, because the Internet has greatly reced the distance between time and space, great changes will take place in the business model, organization model and proction model of enterprises, and the external interface of enterprises will also be greatly expanded. Therefore, the connotation of enterprise management will be further extended. In addition to the traditional enterprise finance, inventory, sales, procurement, proction and other management, many other links involving the whole enterprise value chain are also included in the management category. Enterprise management is changing from the effective use and allocation of internal resources to the management of the whole supply chain, and focuses on seeking the best way to combine e-commerce with its own operation mode. Under the promotion of e-commerce technology, the modern enterprise management mode is moving forward; Operation process, function integration and flat organization & quot; The trend of the development. From the perspective of business mode, the current e-commerce application mode is mainly divided into online market type, online efficient type, online service type, online commodity trading type and e-commerce community type. Online market is mainly through the network to display enterprise procts and services, in order to attract customers, strive to expand market share, and improve the quality of customer service through online customer service system. The online high-efficiency model mainly uses the cheap communication platform brought by Internet to provide information transmission channels for enterprises with wide distribution in space, so as to promote the exchange of internal and external information, improve the office efficiency of enterprises and rece the management cost. Online service type mainly provides customers with knowledge, experience, information proct services or online technical services through the Internet, such as online consultation, online ecation and training, online software upgrade and maintenance, online security diagnosis, etc. Online commodity trading is a huge technical and commercial system established to reflect the high efficiency, transparent price and comprehensive information of online operation. This type of website can not only provide online proct display and customer service, but also fully solve the technical barriers and commercial fortress of online payment, certification and distribution, It can also provide online purchase and sale services. The e-commerce community based on the online market model makes use of the advantages of the Internet to connect the government, financial institutions, enterprises, etc. to form an online virtual community. This model is in practice and needs further discussion. The participation of enterprises in e-commerce is not only the application of software or technology, but also the change of enterprise operation and management mode. From this point of view, this work needs to be further carried out, and many related theories and technologies need to be further studied. The main scientific issues include the operation environment and development strategy of China's e-commerce, the legal environment, financial environment, humanistic environment and relevant policies of e-commerce, the development mode and overall framework of e-commerce suitable for China's national conditions, the internal nature of e-commerce, and the relevant conditions for the benign operation of e-commerce 1) Research on the legal environment in the development of e-commerce. It mainly includes privacy, tax, intellectual property, international cooperation, contract law, anti-monopoly law and so on 2) Research on financial policy in e-commerce environment. Such as: electronic money, online payment and financial risk management 3) Network ethics research. It mainly includes system security, national policies, decision-making and ethical guidance, development of network morality, ecation and management of network morality, etc 4) Research on the influence of e-commerce on society, economy, culture and enterprise form. Business model research mainly studies the theoretical analysis and practical application of different business models, discusses how to use the network to establish contact with business partners, and how to establish new communication channels with customers 1) Research on the application of business model in e-commerce environment. It includes various commercial activities based on e-commerce, such as online shopping, online publishing, online marketing, online negotiation, online securities trading, online auction, online banking, distance ecation and training, etc 2) Marketing research in e-commerce environment. This paper analyzes the influence of e-commerce on various existing marketing channels, studies the psychological and behavioral characteristics of consumers under the network economy, studies the theory and method of E-marketing, marketing strategy and information dissemination mode, etc 3) Research on different ways and business strategies for enterprises to enter the field of e-commerce 4) Research on the mode of electronic market (EM). Including negotiation, auction, online market mechanism, etc 5) Research on the effective collection and utilization of business information. This paper analyzes the mechanism of network economy, studies the internal mechanism of network economy with e-commerce as the main form, establishes the operation simulation model, and discusses its evaluation and measurement methods 1) The evolution of network economy and its influence on real economy 2) Research on the new rules of network economic competition 3) Research on Agent-based Network economic system simulation model. This paper mainly discusses the operation mechanism of the network economy system, the management and decision-making of enterprises under the e-commerce environment, and the ways and methods of the government's macro-control 4) Research on the future government management of the Internet. This paper focuses on the influence of network economy on the environment of government operation and the expectation of citizens, the change of government structure and function, and the government's guidance and regulation of Internet development 5) Research on the identification and measurement method of business information value. Research on management change caused by e-commerce studies the change of management mode caused by e-commerce, including the enterprise's strategic view, value view, competition view and development view, involving business strategy, enterprise form, enterprise culture, business process, technological innovation and talent cultivation 1) Research on the theory and method of supply chain management in e-commerce environment 2) Research on logistics management and control in e-commerce environment 3) Research on enterprise restructuring, process reengineering and business transformation in e-commerce environment 4) Research on virtual enterprise merger and acquisition, website Association and group website management in e-commerce environment 5) Network organization design, alliance strategy, internal benefit distribution mechanism and rationality evaluation 6) Research on enterprise culture, enterprise form and cooperation and competition strategy among enterprises in e-commerce environment 7) The theory, method and application of knowledge management. It mainly includes: the transformation from uncoded tacit knowledge to organizational coded knowledge; The dynamic mechanism of knowledge innovation; Knowledge discovery, collection, arrangement, sharing and protection; The development and management of knowledge-based procts and services; Human capital training and innovation incentive research 8) Research on new problem oriented management technology. This paper focuses on the intersection of the existing management technology with behavioral science, computer science, information science, economics and other disciplines in the network economic environment.

9. The definition and difference between information and data the object of management information system is data and the result is information. Data is a non random mark or symbol stored in a kind of media. It describes the characteristics of some entity in the objective world and is a recognizable abstract symbol. Information is valuable data information after processing, data with certain meaning, and data with real or potential value for decision-making or behavior. The classification of information is divided into internal information and external environment information according to enterprise subject, formatted information and unformatted information according to standardization, quantitative information and qualitative information according to description, text information and digital information according to description character, important information and secondary information according to importance, and political, economic and military information according to application field, According to the enterprise management level, it can be divided into strategic planning (strategic level), management control (tactical level) and operation control. The attributes of information include information value, processability, transmissibility, storability, sharing, lag and timeliness. The characteristics of the system are aggregation, relevance, hierarchy, integrity, purpose and environmental adaptability. System engineering thought: overall optimization thought, combination thought, decomposition and coordination thought, system engineering thought (clear problem, system analysis, system synthesis, system design, optimization, decision-making, plan implementation). Information system includes classification process control system, information resource service system, management information system and others. Information system functions: information collection, storage, processing, transmission and output. Management information system is a man-machine information system, which is guided by modern management theory, based on modern information technology such as computer and network communication facilities, and guided by system thought. It can collect, transmit, process and store information, and provide decision-making information for managers. The concept and characteristics of three types of management information system: (1) transaction processing system TPS: deals with the daily affairs of the enterprise. Characteristics: transaction information is highly structured information, with large amount of information, clear problems, standardized processing methods, and the information provided is generally standardized reports. The advantage is that it can obviously improve the efficiency of management personnel in dealing with daily affairs, and improve the accuracy and timeliness of management information processing. The disadvantage is that the system is not developed from the perspective of the overall optimization of the enterprise, which is used at the grass-roots level and does not support the work of the middle and high-level. ② Enterprise management information system (MIS): it is developed and constructed from the perspective of enterprise overall optimization. In addition to dealing with daily affairs, it also provides summary reports and various conventional data reports of relevant enterprises. It is used at the grass-roots level and has a supporting role for middle-level management, but little or no support for senior management. ③ DSS: the system includes MIS and decision support function, which can support the middle management and the top management. The feature is that it contains highly structured and unstructured information, and the transaction contains normative and nonstandard issues. The functions of management information system include: 1. Data processing; 2. Prediction; 3. Planning; 4. Control; 5. Assistant decision. From the aspect of information processing: information collection, input, transmission, storage, processing, maintenance and use. Structure of management information system 1 enterprise data 2 computer hardware system 3 software system 4 mass storage medium 5 communication system 6 special information collection and processing equipment 7 management information system rules and regulations 8 management organization 9 staff. Bar code technology is an optical automatic identification technology. Bar code is composed of a group of bar and empty symbols arranged according to certain coding rules to represent the information composed of certain characters, numbers and symbols. Compared with other automatic identification technology, the cost is low and the operation is simple. One dimensional bar code system, bar code and space arrangement rules, commonly used one-dimensional code system: ean code, 39 code, cross 25 code, UPC code, 128 code, 93 code, Codabar code, etc. Insufficient: limited information. It can only identify items, and the description needs the support of background database. Chinese characters are inconvenient and inefficient. Two dimensional bar code features high density, error correction function, multi language expression and encryption mechanism. Barcode technology is applied to proct tracking, proct label management, proct in and out of warehouse management, internal warehouse management, distribution management and warranty maintenance. GPS concept navigation, time service and positioning system. The space part (GPS satellite constellation) consists of 24 satellites evenly distributed in 6 orbital planes, including 21 practical satellites and 3 standby satellites. 2. The ground control part (ground monitoring system) includes one main control station, three injection stations and five monitoring stations. 3. User equipment part (GPS signal receiver) GIS concept, namely geographic information system, is the epitome of the resources and environment of the whole earth or part of the region in the computer. Based on geospatial data, with the support of computer software and hardware, it collects, manages, operates, simulates, analyzes and displays the spatial related data, and adopts the method of geographic model analysis, It is a computer technology system that provides various spatial and dynamic geographic information timely and serves for geographic research and decision-making. Information consists of spatial information (location information, non location information, i.e. attribute information, time information) and geographic information, including spatial data and attribute data. GIS functions include data collection and input, data editing and updating, data storage and management, spatial query and analysis (core), data display and output. Application 1 urban and rural planning 2 resource inventory 3 natural disaster monitoring 4 land survey 5 urban network management 6 macro decision 7 development in the field of transportation. EDI (electronic data exchange) is a kind of electronic means to transfer orders, invoices and other operating documents between companies. It is a technology to automatically transfer business transaction information between computers in standard format (to realize data exchange and processing between departments or companies), And complete the whole process of taking trade as the center) EDI elements: ① computer application (application conditions, including computer software and hardware, mainly for the transmission of standard data files and automatic identification and processing of receiving and sending files); ② communication network (provide a wide coverage, efficient and safe data communication network as the technical support environment for EDI transmission files; Message processing system (MHS) provides the most ideal communication environment for EDI. ③ data standardization (UN / EDIFACT has made standard provisions on file structure, format, syntax rules, etc., which has become the mainstream of EDI standard). ① purchase mature software. Advantages: save time and cost, high technical level, can improve the level of enterprise management, standardize enterprise management, solve many problems. Disadvantages: poor specificity, may not be completely suitable for the needs of the company's business department, and with the increase of the use of moles and in-depth application problems, either scrap, or rece the system goal. ② Partial customization. There will be some troubles in the maintenance of specific parts. ③ Commissioned from scratch. Advantages: fast, easy, the development of the system technology level is higher. Disadvantages: the cost is very high, the system maintenance needs the long-term support of the development unit. In this way, the entrusting unit needs to send business personnel to participate in the analysis and demonstration of the system. In the development process, both parties need to communicate in time and fully coordinate. ④ Cooperative development. Advantages: in the development process to establish and improve training, improve their own development technology team, cultivate the technical force of the unit, easy to maintain and upgrade the system in the future. Disadvantages: the two sides are prone to poor communication in cooperation, which requires timely coordination and consensus. ⑤ Completely independent development. Advantages: enterprises can finally have the source code of the system, which is convenient for the upgrade and maintenance of the system. They can develop other similar systems on this basis, and the developed system can completely meet their own needs with high satisfaction. When the conditions are ripe, we can push the system software to the market, set up a computer software company, and further gain profits. The disadvantage is that the development risk is high, the success rate is low, and the system development is often delayed. Once it fails, it will cause great losses. The principles of MIS development are benefit first, step-by-step implementation, adaptability, standardization and reliability. The core idea of structural development method is phased, molar (the system is divided into subsystems, and then divided into moles, and then divided into sub moles), top-down (top-down decomposition, bottom-up combination development). Structure development life cycle (1) system planning: according to the goal and development strategy of the enterprise, the development strategy (Strategic Planning) of the management information system, the overall information demand of the enterprise is analyzed, the overall structure scheme of the information system is determined, and the construction projects (enterprise information demand analysis) are divided, Estimate and arrange all kinds of resources needed for system construction (resource allocation) 2. System development: system analysis (preliminary investigation, feasibility study of development project, detailed investigation of current system, putting forward logic scheme of new system) and system design (overall structure design, data storage design, input and output design, processing process design Computer and network system scheme selection, software programming) is the core stage of system construction. ③ System implementation: software package purchase, computer and network equipment installation and debugging, system testing, new and old system conversion, system operation and maintenance (system operation organization and management, system evaluation, corrective maintenance, adaptive maintenance, perfect maintenance, preventive maintenance). 1) strictly distinguish the working stages. It is convenient for plan management and schele control, and it is not easy to rework. 2) The principle of graal refinement from top to bottom. In the system analysis and design, we should consider the overall situation. In the system implementation, we should first compile specific functional moles according to the design requirements, and then graally realize the whole system from the bottom up. 3) Customer first principle. Users are very important to the success or failure of system development. In the development process, they must keep close contact with users, fully understand the needs and wishes of users for the system, and let users understand the progress of the system, so as to ensure the correct direction and quality of development work. 4) Documentation of work achievements, standardization and standardization of documents. Easy to manage, communicate and use. 5) Applicability. It is suitable for large-scale systems and complex systems. The purpose is to ensure the reliability of the system. The steps are strict, and the integrity and overall situation of the development process are emphasized. The problems found in each stage can be summarized and corrected in time. Conclusion defect 1. Long development cycle, can not fully understand the needs of users and possible changes, only in the first few stages of communication with users, the depth of user intervention in system development is not enough, the system requirements are difficult to determine. 2. Too many documents and complicated development process. The basic idea of rapid prototyping is to quickly build a running result model (prototype) of the system with the help of software development tools. This prototype is only the framework of the system, but it reflects the main functions and structure of the system, and has not been realized internally To develop management information system, we should first summarize the initial requirements of users, then construct a suitable prototype and run it, and then through the continuous analysis of the prototype running situation between system developers and users

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