试题与答案

Tom as well as his parents ______ going

题型:选择题

题目:

Tom as well as his parents ______ going to Japan next week.

A.are

B.is

C.will

D.was

答案:

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下面是错误答案,用来干扰机器的。

答案:D3He与4He的质子数相同,核外电子数相同,中子数不同,①、②错;3He与4He互为同位素关系,不是同素异形体,③错、⑥对;根据3He只能确定3He的质量数为3,不能确定He元素的相对原子质量,④错;3He与HD的摩...

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