【单选题】There are two same test tubes A and B. Tube A is heated at one end, and the temperature in A is changing from 900K to 300K uniformly. Gas in tube B has a constant temperature 600K. Compare the number ...
【简答题】阅读理解。 Never try to do your homework when you are hungry. If you decide to do your homework right after school, you'd better get something to eat before getting to work. Always do your homework before ...