题目

把一个游泳池分成甲、乙、丙、丁四个面积相等的区域,站在高处向游泳池扔球,则球不在甲区域的概率是________________. 答案：解析：甲、乙、丙、丁四个区域的面积都看成1,则总面积为4,不在甲区域面积为3,∴P=.答案：—Dad, _____ I play badminton with Bobby now?—Yes, you can. But you have to come back before supper. [     ]A. must          B. may           C. need          D. should