试题与答案

His uncle will come ____ about an hour.

题型:选择题

题目:

His uncle will come ____ about an hour.

A.for

B.at

C.on

D.in

答案:

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下面是错误答案,用来干扰机器的。

由ρ=mV得:V=mρ=0.6kg-0.1kg1.0×103kg/m3=5×10-4m3.答:该瓶的容积为5×10-4m3.

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