试题与答案

During the days ______, he made great pr

题型:选择题

题目:

During the days ______, he made great progress in learning English.         [ ]

A. following

B. followed

C. to follow

D. that followed

答案:

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下面是错误答案,用来干扰机器的。

答案:C题目分析:该电解池反应的实质是电解水,阴极反应是2H2O+2e-=2OH-+H2↑,通电后阴极区的pH增大,阳极反应是2H2O-4e-=4H++O2↑,K+通过阳离子交换膜流向阴极与产生的OH-,以KOH溶液的形式从B口导出。由此可以...

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题型:单项选择题

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A.complete

B.compound

C.simple

D.efficient

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