题目内容

蓄能器与液压泵之间还应安装单向阀。以防止液压泵停转时蓄能器内的____。

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蓄能器功用有:系统保压、应急能源、缓和冲击压力、吸收脉动压力、持续供油。

A. 对
B. 错

What is the teacher’s name?[音频]

A. Lindsay Black
B. Lindsey Black
C. Linsey Black

What room is the class in?

A. Room 13
B. Room 30
C. Room 33

What days is the class?

A. Monday and Tuesday
B. Monday and Wednesday
C. Monday and Thursday