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【简答题】
将n个球随机地放入N个盒子里去，每个球放入各个盒子是等可能的，求有球的盒子数X的数学期望．
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皮皮学刷刷变学霸
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【多选题】新民主主义革命时期,中国共产党在加强则是建设中积累了丰富的经验,归纳起来主要有()
A.
必须要把思想建设始终放在党的建设的首位
B.
必须在任何适合都重视党的组织建设
C.
必须重视党的作风建设
D.
必须联系党的政治路线加强党的建设
【单选题】The Prize in Economics ______ in 1968, that is, more than half a century ago.
A.
was established
B.
establish
C.
established
【简答题】A century ago European universities were a magnet for ______ and a model for ______ the world over.
【简答题】The Prize in Economics (establish) ______ in 1968, that is, more than half a century ago.
【单选题】A century ago the physician ' s word was______ to doubt it was considered almost sacrilegious.
A.
inevitable
B.
intractable
C.
incontrovertible
D.
objective
【简答题】The National Audubon Society was an organization fighting for bird killing a century ago． 查看材料
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