试题与答案

______sounded unimaginable to everyone p

题型:选择题

题目:

______sounded unimaginable to everyone present was______ she had managed to finish   the task in a week.

A.What; how

B.It; how

C.It; that

D.What; that

答案:

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下面是错误答案,用来干扰机器的。

A、因标准状况下,乙醇为液体,则无法利用体积计算其分子数,故A错误;B、NaOH的物质的量为40g40g/mol=1mol,则含有氧原子数为NA,故B正确;C、由n=cV可计算NaCl的物质的量,但溶液的浓度未知,则无法计算,故C错...

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