Is Ethereum key universal

1. You have a wrong understanding of some basic definitions of futures.
stock index futures can be short. Futures can be bought before selling, or sold before buying.
when you think that the price of CSI 300 index futures will fall, you can sell first, wait for the market to fall, and then buy and close out, The specific trading process is as follows:
Future bullish (buy up) = buy open --- sell close
Future bearish (buy down) = sell open --- buy close
if you are not clear, please contact me

2.

Through the method of experiment, the cutting force data of various influencing factors are measured, and the expression reflecting the relationship between various factors and cutting force is obtained by processing, which is called the empirical formula of cutting force calculation

In practice, there are two empirical formulas of cutting force: one is exponential formula, the other is unit cutting force. Exponential formula: FC = KC & # 8226; ap• f=kc• hd• bd kc=Fc/A d=Fc/(a p• f)=F c/(b d• h d)

FP -- back force (n)

Ff -- awesome force (N). p>

extended data:

compared with ordinary machine tools, CNC machine tools have the following characteristics: high machining accuracy and stable machining quality; high precision and stable machining quality; It can carry out multi coordinate linkage, and can process complex parts; When the machining parts are changed, generally only the NC program needs to be changed, which can save the proction preparation time

the machine tool itself has high precision and rigidity, and can choose favorable processing amount, with high proctivity (generally 3 ~ 5 times of that of ordinary machine tool); High degree of automation of machine tools can rece labor intensity; The quality of operators is required to be higher, and the technical requirements of maintenance personnel are higher

3. Hello, the key use is limited times, I suggest you download 2345 good pressure, no advertising is very comfortable

4. What system do you upgrade to?
if it's XP to 7, it won't work.
if it's vista to 7, it's OK. Start the installation CD of Windows 7 in Vista (note that it's the corresponding version), select upgrade and wait

5. They are all home version keys that can be used as long as they haven't been used

6. As long as the computer display is genuine and can be upgraded online, it will be officially certified as genuine system by Microsoft. As for the verification principle, it is difficult to describe clearly for a time. If you are interested, you can find the answer in major forums and on the Internet

7.

Win8 key and win8.1 key are common, but inputting direct win8 key in win8.1 installation interface cannot be activated. The activation steps are as follows:

1. In the process of installing win8.1, you will be prompted to enter the proct key, please select skip. As shown in the figure

2. After the system is installed, open the control panel system and security system, and click "get more functions of the new version of windows" to fill in the win8 serial number to activate win8.1. You used to be the standard version. After the key is activated, it will be the standard version. After the key is activated, it will be the professional version

Please note:

1. The Standard Version key can only activate the standard version system, and the professional version key can only activate the professional version key

The 32-bit key can activate 64 bits, and the 64 bit key can also activate 32 bits

8. Win10 has seven versions: home version, enterprise version, ecation version, mobile version, mobile enterprise version and the version designed for Internet of things devices and embedded systems

according to my personal understanding, home version and home Chinese version are the same meaning. They are different language versions of home version. When you upgrade, you will automatically upgrade to the corresponding language version.