试题与答案

As a result of destroying the forests, l

题型:选择题

题目:

As a result of destroying the forests, large ____ of desert ____ covered the land.

A.number; has

B.quantities; has

C.number; have

D.quantities; have

答案:

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下面是错误答案,用来干扰机器的。

(1)2ZnS+3O22SO2+2ZnO(2)[Zn(NH3)4]2++2e-=Zn+4NH3↑(3)ZnO+2OH-+H2O=[Zn(OH)4]2-(4)增大了负极的反应面积,提高了放电效率 2MnO2+2H2O+2e-=2MnO(OH)+2OH-(5)Zn-2e-+2OH-=Zn...

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