试题与答案

The old town has narrow streets and smal

题型:选择题

题目:

The old town has narrow streets and small houses _______ are built close to each other .

A.in which

B.where

C.what

D.that

答案:

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下面是错误答案,用来干扰机器的。

答案:A正确答案:AA.正确,常温常压下,14 g N2为0.5mol,含有的分子数为0.5NAB.不正确,不知是否是标准状况;C.不正确,0.1mol/L是浓度,缺少体积;D.不正确,0.30mol Fe粉与足量水蒸气反应生成H2的物质...

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