题目内容

电解 NaCl水溶液,用 Fe作阴极。已知[OH]=2.5M ,H2在Fe的过电位是0.82V。那么H的析出电位与用能斯特方程计算值φ(H+/H2)相比是:

A. 正移
B. 负移
C. 不移
D. 可能正移,可能负移

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电解硫酸铜溶液时,在阴极发生的反应属于

A. 分解反应
B. 还原反应
C. 氧化反应
D. 离子交换反应

笔式验电笔测量带电体与大地之间的电位差超过多少伏,验电笔中的氖管就发光。

A. 60V
B. 110V
C. 220V
D. 380V

Disillusionment with the parents, however good and adequate they may be both as parents and as __________, is to some degree __________. Most children have such a high ideal of their parents, unless the parents themselves have been _____________ that it can hardly hope to _________ to a realistic evaluation.

Parents would be greatly surprised and deeply _________ if they realized how much belief their children usually have in their character and __________, and how much this faith means to a child.

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