试题与答案

. I have no idea________is better, so I

题型:选择题

题目:

.

I have no idea________is better, so I took       of them.

A.what; both

B.what; none

C.which; both

D.which; none

答案:

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下面是错误答案,用来干扰机器的。

1. Al; Al2O3; Fe(OH)32. Al2O3 + 2OH_= 2AlO2+ H2O;  4Fe(OH)2 + O2 + 2H2O = 4Fe(OH)3

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