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可发生重氮化反应的是E．

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There is a sentence in the second paragraph: "In a hundred closed cafes the espresso machines give an expiring hiss, as if at last slipping off their shoes and wiggling their toes. " How do you understand this sentence？

A. It means that the coffee machines have been used for too much and cannot be used any longer.
B. It implies that the owners of these cafes are so tired that they just want to have a good rest.
C. It suggests that the owners of these cafes have lost their shoes and their toes feel painful with cold．
D. The coffee machines are going to stop working; it is just like what a person does before he goes to bed after a day's hard work.

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骨盆多处骨折后出现排尿困难的为E．

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证券经纪商的交易系统自动检验客户的证券买卖申报数量和价格等是否符合证券交易所的交易规则。()

A. 正确
B. 错误

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在债券全价交易的情况下，成交价格与应计利息是分解的。()

A. 正确
B. 错误

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