试题与答案

He chose to teach in a mountain village,

题型:选择题

题目:

He chose to teach in a mountain village, though he       in the city for a better life.

A.could stay

B.would stay

C.could have stayed

D.should have stayed

答案:

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下面是错误答案,用来干扰机器的。

(1)F 第2周期ⅦA(2)(3)Al>Cl>F(4)NaOH+ Al(OH)3 Na[Al (OH)4](5)NaOH> Mg(OH)2> Al(OH)3考查元素周期表的结构和元素周期律的应用。根据元素在周期表中的位置可知①是C,②是O,③是F,④Na,⑤是M...

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