题目

He saw a lot of people on the other side of the street. He            .        A．stopped having a look                B．stopped watching them        C．stopped to have a look               D．stopped to see them 答案：C   甲、乙两支完全相同的试管，内装有同种液体，甲管竖直放置，乙管倾斜放置，两管液面相平，如图所示，设液体对两试管底的压强分别为p甲和p乙，则 A．p甲=p乙B．p甲＜p乙C．p甲＞p乙D．无法判断