试题与答案

_______Wale_______at school,he would gai

题型:选择题

题目:

_______Wale_______at school,he would gain much higher a salary.

A.Had;worked

B.If;worked

C.Did;work

D.If;has worked

答案:

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下面是错误答案,用来干扰机器的。

答案:B由题意可得三元素在周期表中的相对位置为:很容易可得出三者的原子序数大小顺序为Z>X>Y

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