题目内容

既能与Tollens试剂作用,又能与NaHCO3作用的是:………………….... ......…()

A. 甲醛
B. 甲酸
C. 乙醛
D. 乙酸

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A second flaw in the way people cope with decisions is defensive ____(逃避).

Ignorance about one's career is not ____(无上幸福); reason is better than chance and fate.

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