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问题 选择题
工业上常用加热的方法给酒精和水的混合液加热，当混合液的温度达到一定温度时，就可将酒精从水中分离出来，这是利用了酒精和水的（　　）

A．沸点不同

B．吸热多少不同

C．温度不同

D．熔点不同

答案

答案：A

单项选择题

Woman: Let’s go to that piano recital instead of the rodeo.
Man: Yes, but we went where you wanted to go this morning.
Question: What does the man imply().

A. The woman would like the rodeo.

B. The woman always gets what she wants.

C. They went to a recital this morning.

D. It would be fairer if they went to the piano recital.
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单项选择题

钢中产生白点缺陷的内在原因是钢中含（）

A.氮

B.氢

C.氧

D.硫
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