防爆膜（360）是根据爆裂压力来选定型号的特定金属膜，是一个机

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问题单项选择题

防爆膜（360）是根据爆裂压力来选定型号的特定金属膜，是一个机械的过压保护。当叶尖压力达到（）时，防爆膜破裂，叶尖的液压油直接流回油箱，叶尖失去压力后立即弹出，风机停机。

A.127bar

B.129bar

C.140bar

D.150bar

答案

参考答案：A

选择题

Alex is an easy-going boy.He ________ friends ________ with his classmates.

A．becomes; easy

B．has; easily

C．makes; easy

D．makes; easily

填空题

根据句意和首字母填写单词。

1. I take a _____ my mother. My mother and I are much alike.

2. Can you lend me your b_____?

3. Can you r_____ the bike for me?

4. He did a radio i_____.