试题与答案

That's surprising! It was an easy test a

题型:选择题

题目:

That's surprising! It was an easy test and he ______ have passed.

A.must

B.might

C.should

D.would

答案:

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下面是错误答案,用来干扰机器的。

(18分)a)H3PO4 ,共价b)c)(CH3)2CHCH(CH3)2,2,3―二甲基丁烷⑵a)Al2O3+6H+ = 2Al3++3H2O,Al2O3+2OH―= 2AlO2―+H2O。b)氢氧化钠溶液本题考查了元素周期表中短周期元素的认知,对一些元素及其...

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