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【简答题】
如图,由M到N的电路中有4个元件,分别标为T 1 ,T 2 ,T 3 ,T 4 ,电流能通过T 1 ,T 2 ,T 3 的概率都是p,电流能通过T 4 的概率是0.9,电流能否通过各元件相互独立。已 知T 1 ,T 2 ,T 3 中至少有一个能通过电流的概率为0.999。 (1)求p; (2)求电流能在M与N之间通过的概率; (3)ξ表示T 1 ,T 2 ,T 3 ,T 4 中能通过电流的元件个数,求ξ的期望。
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A.
Having believed
B.
Believed
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Believing
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Being believed
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【单选题】在Word 2010 中,按( )键与功能区中的剪切按钮功能相同
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Ctrl十C
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相关题目:
【简答题】________ the earth to be flat, many feared that Columbus would fall off the edge of the earth. A) Having believed B) Believing C) Believed D) Being believed
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【单选题】What causes the Earth to be warmer according to the video clip ?
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【单选题】_____ the earth to be flat, many feared that Columbus would fall off the edge of the earth. [ ]
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【单选题】护士用冰袋为高热病人进行物理降温,可持续的时间为()
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【判断题】为使路面提供的附着力得到充分利用,ASR应将车轮滑转率控制在10%-30%之间。( )
A.
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B.
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【单选题】_________ the earth to be flat, many feared that Columbus would fall off the edge of the earth.
A.
Having believed
B.
Believed
C.
Believing
D.
Being believed
查看完整题目与答案
【单选题】在Word 2010 中,按( )键与功能区中的剪切按钮功能相同
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Ctrl十X
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查看完整题目与答案
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