题目

He is a policeman and _______ don't like       . A. thief; he          B. thieves; him       C. thiefs; him               D. thiefes; he 答案：B马戏团里一头体重为6×104N的大象，它每只脚掌面积是6×10-2m2，当它站立不动时，对水平地面的压强是________Pa；当它抬起前面两脚表演时，大象对地面的压强是原来的________倍．