题目内容

Winds are ________ but moving air.

A. anything
B. nothing
C. everything
D. all

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________ John ________ Mary knew anything about it.

A. Both; and
B. Either; or
C. /; and
D. Neither; nor

This kind of tree is rare; it is ________ found ________.

A. not; everywhere
B. not; any longer
C. not; nowhere
D. not; anywhere

I have a lot of friends, and ________ of them smokes.

A. not
B. neither
C. none
D. nor

下列哪个量子数是决定电子能量高低的主要因素:

A. 主量子数
B. 角量子数
C. 磁量子数
D. 自旋量子数

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