Ethereum virtual machine runs locally

1.

Ethereum is an implementation of blockchain. In Ethereum network, many nodes are connected with each other to form Ethereum network:

Ethereum node software provides two core functions: data storage and contract code execution

in each Ethereum node, complete blockchain data is stored. Ethereum not only saves the transaction data on the chain, but also saves the compiled contract code on the chain

At the same time, a virtual machine is provided to execute the contract code

Ethereum virtual machine

Ethereum blockchain not only stores data and code, but also contains a virtual machine (EVM) in each node to execute contract code - it sounds like a computer operating system

in fact, this is the core difference between Ethereum and bitcoin: the existence of virtual machine has brought blockchain into the era of 2.0 and made blockchain a friendly platform for application developers for the first time

the above content comes from the introction course of Ethereum DAPP development

2. According to the requirements of the manual, first measure whether the red and green lines correspond to the L1 of the interface; Is the yellow and black line corresponding to L2? If so, it must be the correct connection. Although the telephone line can be divided into positive and negative poles, the terminals can be connected at will, so there is a rectifier directional circuit inside the telephone. Even if the L1 and L2 lines are wrongly connected, the equipment will not be burnt out, so you can safely and boldly test.

3. Internet finance is a financial management project launched by the Internet
every person recommended has 10 yuan. For friends who want to earn extra money in their spare time, this income is very considerable. 20 people are recommended every day, and there are 200 yuan
methods / steps
first, clear the browser cache

Second, you already have a network account: (if you don't have a network account, please register first, and then start the following steps after registration.) Click on the official website of Internet Finance and log in to my small vault

3. Click "go to invest money" to buy from 1 yuan. You only need to buy 1 yuan, and you can withdraw money immediately after the lottery. Finished, you can share it with your friends and collect money as you do

precautions
there are several ways to make money in the promotion of online wallet. We must pay attention to the order, and ask online customer service if we encounter problems

4. Jingdong's "small treasury" of the first batch of procts will stop at 2 monetary funds, Harvest Fund will be "live wallet" and Penghua Fund's "value-added treasure", from the purchase of a cent, carry forward interest every day. And treasure balance similar fund Jingdong Jingdong "small treasury" can always be in shopping

starting from the public registration on March 10, 2014, it can be purchased and activated from the 18th of this month

on March 11, the Jingdong online banking login wallet came to buy the wallet that the users of Jingdong online banking can download on their mobile phones, and then bind the bank card to buy related financial procts

users can transfer funds to "small treasury" to purchase related financial procts. Jingdong "small treasury" will become the company's third-party payment platform "online banking wallet". Based on this, the personal assets of value-added services will be provided to users, so that users can get higher than the normal idle funds of savings income
JD's "online wallet" can also provide functions such as recharge, withdrawal and transfer. The mobile version will also be online on March 18, so we can go to JD to buy it.

5. It's not a lie
"transparent vault" is a proct launched by the payment business brand "network wallet" under the network. Anyone can set up a "small treasury" and invite partners to participate in the fund-raising“ "Small treasury" can ensure that every user can check the fund balance and income and expenditure details anytime and anywhere

"online wallet" is committed to creating a "pay as you go" and "discount everywhere" wallet for consumers, which can meet the payment tool functions of online recharge, online payment, transaction management, life service, cash withdrawal, account reminder, etc. At the same time, it is committed to building a consumer operation platform for user asset management platform and member rights
"super transfer" function: 129 banks have been connected, covering the whole country except Tibet. At present, the service charge is free. Through this function, users do not need to log in to online banking, use U shield and install controls to complete transfer payment; At the same time, there is no cross regional and inter-bank service charge. In addition, the online wallet also provides "both sides" free SMS notification of the payer and the payee
recharging function: at present, mobile phone recharging and online game recharging of online wallet have always maintained the lowest price in the whole network, while other "preferential" methods, including "preferential payment" and "preferential card" for various businesses, will be used
member points function: users can obtain accumulated points by consuming through "online wallet", and the points can be queried in their personal account. Users can obtain special rights and interests by virtue of the points, and can also participate in activities jointly carried out by wallet and merchants and purchase special procts by the way of points cash off
wealth management function: users can purchase a variety of wealth management procts on the network wealth management platform through the "network wallet", becoming a new channel for users to provide value-added services. Since the launch of the online financial management platform, the online financial management procts B, zhuan, Baifa (group purchase) and zhuan (rolling profits) have been widely praised by users in terms of income stability and security.

6. It can be used when it is mentioned in the account;

7. Enter the mobile network map - mine, look at your login. OK, you must login with the mobile phone number of your hotel, and then enter the order - the hotel can see your order
at the beginning, I used other accounts to log in. Although I used that account to book the hotel, it was not displayed because of the different mobile phone numbers. Later, I changed it to the mobile phone number of the hotel.

9. This refers to the file size:
8bit = 1b
1KB = 1024b
1MB = 1024KB
1GB = 1024MB
1TB = 1024gb
bit is the smallest unit of computer storage
byte is the basic unit of computer storage

10. This is just the abbreviation of the name. As long as the English names with m and K prefix can be abbreviated to M.K.