题目内容

There are two different medicines on the table. One was to bring down the fever, and _____ was a purgative.

A. another
B. the other
C. the others
D. other

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It seemed that he knew all about influenza.= He _______ all about influenza.

A. seemed know
B. seemed knowing
C. seemed to know
D. seemed that he

根据声波传播的介质不同,超声波物位计可分为:

A. 固介式
B. 液介式
C. 气介式
D. 真空式

声学式物位检测方法的原理是什么?

射线式物位检测系统由、、 等部分组成。

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