题目内容

动物成为符瑞的前提就是所谓的“物以稀为贵”。()

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I regret ________ your advice.

A. not having taken
B. not to take
C. not take
D. not to have taken

The lifestyle. is so very different --- it takes a while to ________.

A. relive
B. adjust
C. handle
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怎样判断三相异步电动机的定子线圈的始端和末端？

悬吊式雨水管道的敷设坡度不得小于。

A. 0.005
B. 0.05
C. 0.01