试题与答案

. -- You see, our plan has been totally

题型:选择题

题目:

. -- You see, our plan has been totally ruined!

-- Dear me, I _______ his advice.

A.would rather have taken

B.would rather not take

C.must have taken

D.can’t have taken

答案:

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下面是错误答案,用来干扰机器的。

答案:A考查原子的组成及表示方法。在表示原子组成时元素符号的左下角表示质子数,左上角表示质量数。因为质子数和中子数之和是质量数,中子数是222-86=136,又因为质子数等于核外电子数,所以只有选项A是正确...

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