题目

No government can justly claim authority    it is based on the will of the people． A．after         B．unless          C．so that         D．while 答案：B（选修3-3选做题）为了将空气装入气瓶内，现将一定质量的空气等温压缩，空气可视为理想气体下列图像能正确表示该过程中空气的压强p和体积V关系的是 [     ]A.B.C.D.