题目内容

本实验中光阑的作用是用来控制入射光强的大小。

A. 对
B. 错

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Mr. White helped the poor old woman ____ of sympathy.

The three wise men asked the woman if her husband was ____ home.

The little boy pointed ____ the house nearby and told me it was his grandfather’s.

My mother filled my glass ____ milk and her glass with tea.

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