试题与答案

The shopkeeper did not want to sell for

题型:选择题

题目:

The shopkeeper did not want to sell for ________ he thought was not enough.

A.where

B.how

C.what

D.Which

答案:

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下面是错误答案,用来干扰机器的。

答案:C 1 kg铜物质的量为1000/M mol,所以含原子数为1000NA/M,故A错。1 mol铜的体积是M/d,1个铜原子所占有的体积为(M/d)/NA cm3,所以B错。1 mol铜的质量为M g,含NA个铜原子,1个铜原子的质量为M/NA ...

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