Mining prospect
Publish: 2021-03-28 14:29:33
1. In recent years, underground mining technology has developed rapidly at home and abroad, and many new mining technologies, new processes, new materials and new equipment have been applied in underground mines. Some domestic mines and a number of advanced mining technology and equipment have entered the ranks of the world's advanced level
according to the above statistics, caving mining is still the main method for underground mining of iron ore, while open stoping and filling mining are still the main methods for underground mining of non-ferrous and gold mines. In the past ten years, the filling mining method and filling technology of underground metal mines have developed rapidly, and the caving mining method and open stope mining method are constantly improved and innovated. Therefore, it promotes the rapid development of underground mining technology of metal mines in China, and makes the technology of some mines reach the international advanced level.
according to the above statistics, caving mining is still the main method for underground mining of iron ore, while open stoping and filling mining are still the main methods for underground mining of non-ferrous and gold mines. In the past ten years, the filling mining method and filling technology of underground metal mines have developed rapidly, and the caving mining method and open stope mining method are constantly improved and innovated. Therefore, it promotes the rapid development of underground mining technology of metal mines in China, and makes the technology of some mines reach the international advanced level.
2.
There is only one species of hairy crab, Chinese mitten crab. Bacheng is located in the east of Yangcheng Lake, adjacent to the East Lake of Yangcheng Lake. It is an authentic Yangcheng Lake hairy crab procing area. I eat crabs not only from the procing area, but also from Taihu Lake and Hongze Lake every year. If it's better than crab oil, crab roe and crab paste, other Lake crabs and pond crabs are not so bad, but Yangcheng Lake hairy crabs are really the only one with fresh and sweet taste. It's best to find some reliable local crabs farmers. However, I buy some Tang girl's crabs every year and raise them at home. I'm also close to Shanghai. During the crab season, I drive directly to their house to catch crabs in the purse seine, People who love to eat crabs can't get around Yangcheng Lake
in recent years, more and more Yangcheng Lake crabs have been belittled e to their interests. They all depend on their fame and general taste
responsibly speaking, I go to Jiangsu every year from July to see the crab market, to the Mid Autumn Festival gift certificates, to Lidong and snow gift bags, all of which are involved. The price of Yangcheng Lake crabs is two to three times higher than other Lake crabs
when you ask me if Yangcheng Lake hairy crabs have any brand premium, the answer is yes, and there are many
However, the answer is yesif you want to taste Yangcheng Lake, you can only buy Yangcheng Lake
3. "Eat female crabs in September and male crabs in October" in the lunar calendar. Now is the best time to eat female hairy crabs. Because in autumn, the climate graally changes from cool to cold. In September of the lunar calendar, the yolk of the female crab grows most plump; In October, the crab paste (also known as crab oil) of male crabs grows thickest. Therefore, eating crabs has the saying of "nine females and ten males". It means: in September of the lunar calendar, we eat female crabs, and in October of the lunar calendar, we eat male crabs
in September of the lunar calendar, the digestive glands and ovaries of female crabs grow into crab roe to prepare for winter and breeding in the next year (crab roe becomes crab roe in spring). At this time, peel off the crab shell, you can see that there are many yellow and sticky things in the crab shell and crab lump, that is raw crab roe. Cooked, the crab becomes red, and the deeper the red, the stronger the crab. But the male crab grows slowly, until October of the lunar calendar, the fat graally accumulates and grows into crab paste. When you peel off the shell of a male crab, you can see something white and sticky in the same place, which is crab paste. When cooked, the paste becomes translucent. The more crab paste, the stronger the male crab
many people like to eat hairy crabs. It's a good season to eat hairy crabs soon. But many people don't know how to eat the eight foot food. It's really troublesome. Well, in order to meet the requirements of the customers, Xiaobian specially asked a four crab village, a famous old shop in Yangcheng Lake area, for the correct methods and steps of eating crabs, and how to choose the authentic and delicious Yangcheng Lake hairy crabs
a'si crab village is located in Ba town on the East Bank of Yangcheng Lake, which is known as "the first crab city in the world". From Shanghai, drive on G2 Beijing Shanghai Expressway to Nanjing, cross "Kunshan and Zhangpu" and keep on going. Keep on going for 6 km, turn S5 Ring Expressway to "Bacheng and Changshu", keep on going for the first pass "Bacheng and Kunshan", keep on going for Highway 7, turn to S48 and keep on going for Wuxi, keep on going for Highway 6 and get off the expressway from "Yangcheng Hubei and Bacheng North", After leaving the toll station, turn left for about 1.2 km to a'si crab village at the entrance of Xiefang garden in Chunqiu Shuicheng
the manager of a'si crab village warmly received us and gave us very detailed answers to our questions. The first step in eating crab is to lose eight feet of hairy crab, including two tongs. After cooling, the meat will be separated from the crab shell automatically, and it is easy to be poked out or even sucked out, so it should be left for the last time to eat
the second step is to remove the hairy crab cover (i.e. a small part of the belly button of the crab, which is different in shape for male and female crabs) and remove the cover accordingly
the third step is to eat the crab cap, scoop out the stomach of Yangcheng Lake hairy crab with a small spoon, and gently suck the hairy crab yolk wrapped outside. Attention, do not suck the middle of the triangle shaped crab stomach, should be discarded
the fourth step is to finish the crab cover and turn to the crab body. First, use scissors to cut off the excess crab feet, mouth and lung of Yangcheng Lake hairy crab
Step 5: use the handle of the spoon to pick out a hexagonal piece in the middle of Yangcheng Lake hairy crab, which is the heart of the crab, and discard it
Step 6: pour vinegar on the crab with a small spoon, and then eat the crab roe and crab paste of Yangcheng Lake hairy crab
Step 7: break the body of Yangcheng Lake hairy crab into two parts, and then you can see the silk like crab meat. As long as along the Yangcheng Lake hairy crab feet to tear, you can take out the crab meat. The shell of Yangcheng Lake hairy crab is complete and translucent
Step 8 use scissors to cut the leg into three parts, and the last leg tip can be used as a tool. First, poke out the meat in the middle of the leg with the thin end of the hairy crab's foot, and then poke out the meat in the front of the leg with the thick end of the crab's foot
Step 9: divide the crab tongs into three sections. The first two sections can cut the crab shell directly and scoop out the meat with a spoon. The skill of the last forceps is to cut off both sides, and then use hands to break off two forceps feet in the opposite direction, and the forceps shell is completely separated
Step 10: the crab shell eaten in this way may not be able to match the shape of a Yangcheng Lake hairy crab completely, but it is also well laid out and there is no silk left. After eating Yangcheng Lake hairy crab shell, wash your hands, and then drink a cup of warm ginger tea, you can eat a hairy crab in a meal, and feel full of wine and food
shopkeeper Zhu of a'si crab village said that the four simplest features to distinguish Yangcheng Lake hairy crabs are green back, white belly, yellow hair and golden claws. Different from other Lake crabs, Yangcheng Lake hairy crabs are sweeter and more delicious. In fact, a very simple way to see if the crab is good is to loosen the rope that binds the crab and put the crab on the tile or glass. If the crab can stand up and walk quickly, and not move flat on it, it can be seen that it is Yangcheng Lake hairy crab, because the water quality of Yangcheng Lake is very good, the bottom of the lake is very hard and there is no sludge, So the meat of hairy crabs growing here is very delicious, and the meat inside the legs is very thick and powerful. The easiest way to see if a crab is fresh is to touch its eyes with your hands. If the eyes blink very fast, it means they are very fresh
in September of the lunar calendar, the digestive glands and ovaries of female crabs grow into crab roe to prepare for winter and breeding in the next year (crab roe becomes crab roe in spring). At this time, peel off the crab shell, you can see that there are many yellow and sticky things in the crab shell and crab lump, that is raw crab roe. Cooked, the crab becomes red, and the deeper the red, the stronger the crab. But the male crab grows slowly, until October of the lunar calendar, the fat graally accumulates and grows into crab paste. When you peel off the shell of a male crab, you can see something white and sticky in the same place, which is crab paste. When cooked, the paste becomes translucent. The more crab paste, the stronger the male crab
many people like to eat hairy crabs. It's a good season to eat hairy crabs soon. But many people don't know how to eat the eight foot food. It's really troublesome. Well, in order to meet the requirements of the customers, Xiaobian specially asked a four crab village, a famous old shop in Yangcheng Lake area, for the correct methods and steps of eating crabs, and how to choose the authentic and delicious Yangcheng Lake hairy crabs
a'si crab village is located in Ba town on the East Bank of Yangcheng Lake, which is known as "the first crab city in the world". From Shanghai, drive on G2 Beijing Shanghai Expressway to Nanjing, cross "Kunshan and Zhangpu" and keep on going. Keep on going for 6 km, turn S5 Ring Expressway to "Bacheng and Changshu", keep on going for the first pass "Bacheng and Kunshan", keep on going for Highway 7, turn to S48 and keep on going for Wuxi, keep on going for Highway 6 and get off the expressway from "Yangcheng Hubei and Bacheng North", After leaving the toll station, turn left for about 1.2 km to a'si crab village at the entrance of Xiefang garden in Chunqiu Shuicheng
the manager of a'si crab village warmly received us and gave us very detailed answers to our questions. The first step in eating crab is to lose eight feet of hairy crab, including two tongs. After cooling, the meat will be separated from the crab shell automatically, and it is easy to be poked out or even sucked out, so it should be left for the last time to eat
the second step is to remove the hairy crab cover (i.e. a small part of the belly button of the crab, which is different in shape for male and female crabs) and remove the cover accordingly
the third step is to eat the crab cap, scoop out the stomach of Yangcheng Lake hairy crab with a small spoon, and gently suck the hairy crab yolk wrapped outside. Attention, do not suck the middle of the triangle shaped crab stomach, should be discarded
the fourth step is to finish the crab cover and turn to the crab body. First, use scissors to cut off the excess crab feet, mouth and lung of Yangcheng Lake hairy crab
Step 5: use the handle of the spoon to pick out a hexagonal piece in the middle of Yangcheng Lake hairy crab, which is the heart of the crab, and discard it
Step 6: pour vinegar on the crab with a small spoon, and then eat the crab roe and crab paste of Yangcheng Lake hairy crab
Step 7: break the body of Yangcheng Lake hairy crab into two parts, and then you can see the silk like crab meat. As long as along the Yangcheng Lake hairy crab feet to tear, you can take out the crab meat. The shell of Yangcheng Lake hairy crab is complete and translucent
Step 8 use scissors to cut the leg into three parts, and the last leg tip can be used as a tool. First, poke out the meat in the middle of the leg with the thin end of the hairy crab's foot, and then poke out the meat in the front of the leg with the thick end of the crab's foot
Step 9: divide the crab tongs into three sections. The first two sections can cut the crab shell directly and scoop out the meat with a spoon. The skill of the last forceps is to cut off both sides, and then use hands to break off two forceps feet in the opposite direction, and the forceps shell is completely separated
Step 10: the crab shell eaten in this way may not be able to match the shape of a Yangcheng Lake hairy crab completely, but it is also well laid out and there is no silk left. After eating Yangcheng Lake hairy crab shell, wash your hands, and then drink a cup of warm ginger tea, you can eat a hairy crab in a meal, and feel full of wine and food
shopkeeper Zhu of a'si crab village said that the four simplest features to distinguish Yangcheng Lake hairy crabs are green back, white belly, yellow hair and golden claws. Different from other Lake crabs, Yangcheng Lake hairy crabs are sweeter and more delicious. In fact, a very simple way to see if the crab is good is to loosen the rope that binds the crab and put the crab on the tile or glass. If the crab can stand up and walk quickly, and not move flat on it, it can be seen that it is Yangcheng Lake hairy crab, because the water quality of Yangcheng Lake is very good, the bottom of the lake is very hard and there is no sludge, So the meat of hairy crabs growing here is very delicious, and the meat inside the legs is very thick and powerful. The easiest way to see if a crab is fresh is to touch its eyes with your hands. If the eyes blink very fast, it means they are very fresh
4. How can it be accurately calculated, but there are many examples in my side, but not including me, I am not rich, or woodlouse, but the people who contacted bitcoin early are all f rich. Now I have hoarded some bitcoins in Haobtc. I feel that the appreciation space is still very large. You can also buy some stores at a low price. Feel for yourself.
5. At present, under the premise of the bottleneck in the development of the coal instry, the employment prospect of mining engineering specialty has encountered some difficulties, but it is also an opportunity. Mining belongs to the basic instry and will still play an important role in the future. Graates majoring in mining engineering can be engaged in the design and transformation management of coal mines, iron ores, gold mines, gypsum mines and railways. They can also work in the proction and development, scientific research and teaching of six kinds of mining instries, including metallurgy, nonferrous metals, chemical instry, nuclear instry, non metals and coal, and water conservancy, railway, underground, engineering and environmental protection departments. Mining engineering is a major of Geology and mineral resources. It mainly studies and studies the theory and method of deposit mining, and develops new mining technology. In the world, the major of mining came into being earlier than before. During the instrial revolution in the west, it has a long history. China first established the major in China University of mining and technology in 1909
6. Yes, I checked in
7. I saw you ask this question the day before yesterday, but I didn't answer it because I got a good answer upstairs, which is roughly the same reason. But I'm going to be more specific.
your question, to be simple, is that the brain's fictional calculation ability is not enough when I watch chess
the root cause of this problem is that the image thinking ability of the right brain is not enough! Not enough basic skills! Not proficient enough! Not enough understanding of chess
the solution is to strengthen this thinking ability
specifically:
1. From simple to complex. Put it on the plate, and you can see the variables at the end when you look at the shape. Naturally, practice makes perfect
2. Penlum! A pattern is repeatedly placed on the chessboard until it is perfect, just like star point 33. You can see the changes in the next ten ways at a glance.
3. Do the hand problem as above.
the main points are as follows:
regardless of life or death, hand or pattern, you must be familiar with the analysis of all kinds of changes and cultivate the sense of chess. A game should be clear at a glance, from simple to complex, from playing to not playing, From being able to see 3 or 5 steps to being able to see more than 10 steps, the ability of mental arithmetic is constantly strengthening
another good way is to repeat and practice some key points of winning or miscalculating in your own game, especially when you are killed by your opponent, and repeatedly analyze the reasons and positive solutions. At this time, you will see clearly when you are outside the game, and you will be deeply impressed because you are killed. It is at this time that you can understand a lot of chess theories. If you do not repeat, you will be in vain, Second round is more important than chess
if you can graally understand some excellent players in the famous games through the above methods, you can make great progress as long as you understand one hand. This is how I learned it. Therefore, it's not terrible to put notation. Professional chess players often have to put it, but after that, they have to remember it badly
it's just about basic things, but it's definitely about fixing the right path
because I love go and see your studious spirit, I hope you can have a try on what I'm talking about, and you will benefit a lot!
your question, to be simple, is that the brain's fictional calculation ability is not enough when I watch chess
the root cause of this problem is that the image thinking ability of the right brain is not enough! Not enough basic skills! Not proficient enough! Not enough understanding of chess
the solution is to strengthen this thinking ability
specifically:
1. From simple to complex. Put it on the plate, and you can see the variables at the end when you look at the shape. Naturally, practice makes perfect
2. Penlum! A pattern is repeatedly placed on the chessboard until it is perfect, just like star point 33. You can see the changes in the next ten ways at a glance.
3. Do the hand problem as above.
the main points are as follows:
regardless of life or death, hand or pattern, you must be familiar with the analysis of all kinds of changes and cultivate the sense of chess. A game should be clear at a glance, from simple to complex, from playing to not playing, From being able to see 3 or 5 steps to being able to see more than 10 steps, the ability of mental arithmetic is constantly strengthening
another good way is to repeat and practice some key points of winning or miscalculating in your own game, especially when you are killed by your opponent, and repeatedly analyze the reasons and positive solutions. At this time, you will see clearly when you are outside the game, and you will be deeply impressed because you are killed. It is at this time that you can understand a lot of chess theories. If you do not repeat, you will be in vain, Second round is more important than chess
if you can graally understand some excellent players in the famous games through the above methods, you can make great progress as long as you understand one hand. This is how I learned it. Therefore, it's not terrible to put notation. Professional chess players often have to put it, but after that, they have to remember it badly
it's just about basic things, but it's definitely about fixing the right path
because I love go and see your studious spirit, I hope you can have a try on what I'm talking about, and you will benefit a lot!
8. You don't call it poor computing power, my friend. It should be called sloppy, right? In fact, everyone is the same. Give you a few methods, 1, first of all, we must concentrate on thinking, very seriously treat each problem, after finishing to test again. Of course, the calculation problem to do more time efficiency
draft is very important in calculus
2. Take draft seriously. I don't know how you draft it.
draft can't be too sloppy. A topic should be written step by step. Don't omit it at the beginning.
try to use "circle, circle, circle, circle, circle, circle, circle, circle, circle, circle, circle, circle, circle, circle, circle, circle, circle, circle, circle, circle, circle It's also helpful to cross out the data you don't want in time.
when the correct rate comes up, you can improve your speed and do more mental calculation.
3. For basic skills, you should practice oral calculation, simple addition, subtraction, multiplication and division, and remember some common numbers, For example, what is the square of each integer from 11 to 19? We remember it in primary school
in addition, we should improve our ability of vertical calculation, especially multiplication and division. Don't laugh. This is the basic skill
. This is how to improve your computing ability. Source: aoshu.com article author: Mr. Liu Honghe, 2009-05-05 13:33:10
[tag: psychological answer contest answer mathematics comparison and estimation]
how to improve your computing ability
Liu Honghe created in February 2009
in the elementary school entrance examination and all kinds of examinations, calculation questions are involved every time, And the score rate of each calculation is surprisingly low. This phenomenon exists not only in primary school examinations, but also in junior and senior high school examinations. Is the title difficult, or is there another reason? How to avoid losing points in calculation it is urgent to improve students' calculation ability
firstly, it analyzes the causes of students' low computational ability. First, we don't pay attention to calculation, and we are lucky. Many students only ask for & quot; Yes;, Impractical & quot; Solution & quot;, It's even considered a waste of time. Senior examination & quot; History of blood and tears & quot; Tell us, in the exam, the question will be easy to read, but it just can't work out the correct answer. So & quot; Without understanding I think I will be right in the exam. I can't be lucky. Second, students; High conservation & quot; Talk without action. In the process of teaching, the teacher asked the students to carry out calculation training. Many students keep their eyes fixed on the formula and recite words in their mouth. They start to calculate like a computer program, and then report their opinions; Correct & quot; The answer to the question. Many students think & quot; Moving mouth & quot; Compared with & quot; Hands on & quot; Save time, but our calculation is not just the pursuit of speed, but the pursuit of speed under the condition of ensuring the accuracy. Thirdly, & quot; Saving time;, With the help of a calculator. A considerable number of students use calculators, mobile phones and other tools to improve & quot; Work efficiency;, But when the exam is not allowed to bring a calculator, then can only use their own untrained, already rusty head, the accuracy rate can be imagined
how to improve your computing power in a short time< First, abandon the original & quot; Bad habits;, Build good habits. 1、 We should pay attention to calculation, even simple calculation. I have to work out the correct answer to every question. Because 80% of the exam questions need us to calculate the correct answer, so a person's computing ability directly determines the test results. For simple problems, we pursue efficiency; For complex problems, we pursue accuracy. 2、 We should rece | & quot; Self control;, More hands, less mouth. To form a good habit of calculus can not only improve the accuracy of calculation in the examination, but also save our checking time if it is used properly. 3、 Throw away everything that rusts our brains; AIDS & quot;, If you practice your brain, you won't believe that the examination room won't let you take it; The brain
Second, learn to & quot; Calculation program & quot; And pay attention to the simple calculation in the process, many students see the calculation problem, come up dead calculation, until & quot; Count death & quot; until. In fact, facing a formula is like facing a strong man. If you want to knock down an opponent and work out the correct result, you need to find the weakness of the strong man, that is, find the characteristics of the formula, and then take different measures according to the characteristics. After adopting the correct method, we should pay attention to the timely use of simplified calculation methods in the process of operation, especially the basic simplified calculation methods, such as the distribution law of multiplication, the combination law, the rection on both sides of the equal sign and the rection on the numerator denominator, so as to avoid detours< Thirdly, pay attention to the calculation strategy. Generally, we divide calculation into oral calculation, manual calculation and estimation. For simple problems, such as the simple operation between two numbers, we can take oral calculation directly; For the slightly complex formula, we need to do manual calculation; For the following calculation with low accuracy, such as trying to find the range of an unknown number and the integral part of a number in number theory, we can use estimation, as long as we get the result required by the topic; No understanding & quot
fourthly, & quot; Short, flat and fast & quot; A new method of calculation -- evil complement calculation. Time proves that by doing a lot of calculation problems in a short time, students' calculation ability can be greatly improved. Recommend you to do & quot; I love math summer camp -- computing contest; Every year, 25 topics are very representative
finally, we can improve our computing ability by remembering more operation rules and common formulas. Recently, a book "super right brain 19" was found in Beijing Book Building × In fact, it is to let us remember some commonly used formulas and use them flexibly in calculation. Remember some common formulas, we can use the results directly in the exam, which will save more valuable exam time than recalculation. These commonly used formulas are not only used in calculation, but also play an unusual role in decomposing the quality factor and general division
as long as we form good habits, learn to calculate programs, pay attention to calculation strategies, and remember more operation rules and formulas in our brain, we will be able to be extremely brave in the examination room and get the good results we should get
I've been looking for all the above on the Internet for a long time. I hope it can help you and I hope it can be adopted.
draft is very important in calculus
2. Take draft seriously. I don't know how you draft it.
draft can't be too sloppy. A topic should be written step by step. Don't omit it at the beginning.
try to use "circle, circle, circle, circle, circle, circle, circle, circle, circle, circle, circle, circle, circle, circle, circle, circle, circle, circle, circle, circle, circle It's also helpful to cross out the data you don't want in time.
when the correct rate comes up, you can improve your speed and do more mental calculation.
3. For basic skills, you should practice oral calculation, simple addition, subtraction, multiplication and division, and remember some common numbers, For example, what is the square of each integer from 11 to 19? We remember it in primary school
in addition, we should improve our ability of vertical calculation, especially multiplication and division. Don't laugh. This is the basic skill
. This is how to improve your computing ability. Source: aoshu.com article author: Mr. Liu Honghe, 2009-05-05 13:33:10
[tag: psychological answer contest answer mathematics comparison and estimation]
how to improve your computing ability
Liu Honghe created in February 2009
in the elementary school entrance examination and all kinds of examinations, calculation questions are involved every time, And the score rate of each calculation is surprisingly low. This phenomenon exists not only in primary school examinations, but also in junior and senior high school examinations. Is the title difficult, or is there another reason? How to avoid losing points in calculation it is urgent to improve students' calculation ability
firstly, it analyzes the causes of students' low computational ability. First, we don't pay attention to calculation, and we are lucky. Many students only ask for & quot; Yes;, Impractical & quot; Solution & quot;, It's even considered a waste of time. Senior examination & quot; History of blood and tears & quot; Tell us, in the exam, the question will be easy to read, but it just can't work out the correct answer. So & quot; Without understanding I think I will be right in the exam. I can't be lucky. Second, students; High conservation & quot; Talk without action. In the process of teaching, the teacher asked the students to carry out calculation training. Many students keep their eyes fixed on the formula and recite words in their mouth. They start to calculate like a computer program, and then report their opinions; Correct & quot; The answer to the question. Many students think & quot; Moving mouth & quot; Compared with & quot; Hands on & quot; Save time, but our calculation is not just the pursuit of speed, but the pursuit of speed under the condition of ensuring the accuracy. Thirdly, & quot; Saving time;, With the help of a calculator. A considerable number of students use calculators, mobile phones and other tools to improve & quot; Work efficiency;, But when the exam is not allowed to bring a calculator, then can only use their own untrained, already rusty head, the accuracy rate can be imagined
how to improve your computing power in a short time< First, abandon the original & quot; Bad habits;, Build good habits. 1、 We should pay attention to calculation, even simple calculation. I have to work out the correct answer to every question. Because 80% of the exam questions need us to calculate the correct answer, so a person's computing ability directly determines the test results. For simple problems, we pursue efficiency; For complex problems, we pursue accuracy. 2、 We should rece | & quot; Self control;, More hands, less mouth. To form a good habit of calculus can not only improve the accuracy of calculation in the examination, but also save our checking time if it is used properly. 3、 Throw away everything that rusts our brains; AIDS & quot;, If you practice your brain, you won't believe that the examination room won't let you take it; The brain
Second, learn to & quot; Calculation program & quot; And pay attention to the simple calculation in the process, many students see the calculation problem, come up dead calculation, until & quot; Count death & quot; until. In fact, facing a formula is like facing a strong man. If you want to knock down an opponent and work out the correct result, you need to find the weakness of the strong man, that is, find the characteristics of the formula, and then take different measures according to the characteristics. After adopting the correct method, we should pay attention to the timely use of simplified calculation methods in the process of operation, especially the basic simplified calculation methods, such as the distribution law of multiplication, the combination law, the rection on both sides of the equal sign and the rection on the numerator denominator, so as to avoid detours< Thirdly, pay attention to the calculation strategy. Generally, we divide calculation into oral calculation, manual calculation and estimation. For simple problems, such as the simple operation between two numbers, we can take oral calculation directly; For the slightly complex formula, we need to do manual calculation; For the following calculation with low accuracy, such as trying to find the range of an unknown number and the integral part of a number in number theory, we can use estimation, as long as we get the result required by the topic; No understanding & quot
fourthly, & quot; Short, flat and fast & quot; A new method of calculation -- evil complement calculation. Time proves that by doing a lot of calculation problems in a short time, students' calculation ability can be greatly improved. Recommend you to do & quot; I love math summer camp -- computing contest; Every year, 25 topics are very representative
finally, we can improve our computing ability by remembering more operation rules and common formulas. Recently, a book "super right brain 19" was found in Beijing Book Building × In fact, it is to let us remember some commonly used formulas and use them flexibly in calculation. Remember some common formulas, we can use the results directly in the exam, which will save more valuable exam time than recalculation. These commonly used formulas are not only used in calculation, but also play an unusual role in decomposing the quality factor and general division
as long as we form good habits, learn to calculate programs, pay attention to calculation strategies, and remember more operation rules and formulas in our brain, we will be able to be extremely brave in the examination room and get the good results we should get
I've been looking for all the above on the Internet for a long time. I hope it can help you and I hope it can be adopted.
9. Hello: for you who are puzzled by this problem, I use a metaphor, you can suddenly see that the skinny camel is bigger than the horse. Mining engineering involves not only coal mines, but also other mines, such as iron ore, gold mine and so on. Don't beat yourself to death just because of the depression of an instry. Mining is slowly recovering now, and you don't have to go to mines to learn mining related knowledge. For example, it's OK to major in underground engineering.
10. The advantage of early mining is that it is very easy to improve the mining level
the difficulty is that the later it is, the more difficult it is to upgrade the mining level is mainly a waste of time. It is best for you to dig two numbers at the same time
if you want to dig kuisu, then you should dig it at 30
so that the cost of treatment is the lowest
if you want to dig level 7
then you can only upgrade to 50
generally speaking, it is OK
the difficulty is that the later it is, the more difficult it is to upgrade the mining level is mainly a waste of time. It is best for you to dig two numbers at the same time
if you want to dig kuisu, then you should dig it at 30
so that the cost of treatment is the lowest
if you want to dig level 7
then you can only upgrade to 50
generally speaking, it is OK
Hot content