题目内容

仅受径向载荷时选用推力轴承。

A. 正确
B. 错误

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It was demanded that the injured crewmembers（）at once.

A. was treated
B. would be treated
C. being treated
D. be treated

滑动轴承由滑动轴承座、轴瓦或轴套组成。

A. 正确
B. 错误

残疾军人退出现役后伤残抚恤关系如何转移？

光固化阻焊剂在高压汞灯下照射（）即可固化。

A. 1min
B. 1-2min
C. 2-3min
D. 6mi