题目

--Liu Xiang had to give up the race because of his foot. --_________A. What a shame!                B. Of course.                C. He was so careless. 答案：A解析:略从装有2个红球和2个白球的口袋内任取2个球，那么互斥而不对立的两个事件是（ ）A．至少有1个白球；都是白球B．至少有1个白球；至少有1个红球C．恰有1个白球；恰有2个白球D．至少有一个白球；都是红球