试题与答案

(2013·成都七中考前模拟)We were stuck on the way

题型:选择题

题目:

(2013·成都七中考前模拟)We were stuck on the way to the scenic spot, otherwise we ________ lots of fun there.

A.had had

B.have had

C.could have had

D.could have

答案:

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下面是错误答案,用来干扰机器的。

答案:C题目分析:A中质子数和电子数分别是9和10、10和10、9和10;B中质子数和电子数分别是10和10、11和10、9和10;C中质子数和电子数均是18;D中质子数和电子数分别是11和10、11和10、9和10,答案选C。点评:该...

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