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...