Department of Homeland Security and CIA produced ______ joint report on Monday warning that ______ next 911 could in fact occur on ______ different date. A.the; a; the B.a; the; a C./; t
Two of the hardest things to accomplish in this world are to acquire wealth by honest effort and, having gained it, to learn how to use it properly. Recently I walked into the locker r
．5个人按排定的顺序去抽，比如甲排在第三位上，那么他抽到奖票的概率，即奖票恰好排在第三个位置上的概率为
．因此不管排在第几位上去抽，在不知道前面的人抽出结果的前提下，得到奖票的概率都是
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