题目内容

液压传动适宜于在传动比要求不严格的场合采用。

A. 对
B. 错

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液压系统由哪5个部分组成?

液压传动的两个重要特性是什么?

In the Song dynasty, Chuiwan, a primitive soccer game using a leather ball filled with hair, etc. was very popular among people.

A. 对
B. 错

Tai Chi Chuan, also called deep breathing exercise, is practiced by the Chinese on a regular basis to keep fit.

A. 对
B. 错