单选题：It can be inferred from the passage that___

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题目内容：
It can be inferred from the passage that___ A．the Apollo mission was very successful
B．protection from space radiation is no easy job
C．astronauts will have deformed children or grandchildren
D．radiation is not a threat to well-protected space explorers
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Dr. Smith hopes to make this device lighter so as to help th

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分类：理工类  题型：单选题
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He accused that company of breaking the contract.

He accused that company of breaking the contract.A．tearing B．writing C．breaching

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The mail I wrote to my mom was delivered this morning.

The mail I wrote to my mom was delivered this morning.A．received B．lost C．sent D

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保险需求的收入弹性中，Ei<1表示（　　）。

保险需求的收入弹性中，Ei<1表示（　　）。A．收入富于弹性 B．收入缺乏弹性 C．收入负弹性 D．收入无弹性

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大部分的汽车保险是富于弹性的，下列表述正确的是（　　）。

大部分的汽车保险是富于弹性的，下列表述正确的是（　　）。A．｜Ed｜>1 B．｜Ed｜<1 C．｜Ed｜=∞ D．｜Ed｜=0

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