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Ⅰ卷14-21(每题6分)14.对一定量的气体,下列说法正确的是A.在体积缓慢地不断增大的过程中,气体一定对外界做功B.在压强不断增大的过程中,外界对气体
I Volume 14-21 (6 points per question) 14. For a certain amount of gas, the following statement is correct: A. In the process of increasing the volume slowly, the gas must work on the outside B. The pressure increases continuously. During the process, the outside world gas