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【单选题】
设 使n 次独立重复试验中事件A 发生的次数,p 是事件A 在每次试验中发生的概率,则对于任意正数 ,有A.
0
B.
0.5
C.
0.8
D.
1
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举一反三
【简答题】A．She spoke clearly, fluently and dynamically. B．She forgot to make eye contact with her listeners. C．She was distracted and forgot what she wanted to say. D．She was enthusiastic and she used much bod...
【单选题】She______ her homework at home. She didn't know ______ to do. [ ]
A.
forgot; how
B.
left; what
C.
forgot; what
D.
left; how
【简答题】She has caught cold, because she completely forgot ____ the windows last night. (a) locking (b) being locked (c) to lock (d) to have locked
【简答题】A) She got up later than usual. B) She took the wrong train. C) She forgot that she should work. D) The train was late.
【简答题】Even when she became rich and famous, she never forgot her _______background. A) ethnic B) cultural C) humble D) religious
【简答题】对于穿行数据则采用()输入并加以保存
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