题目内容

If people don't like ( ) By titles, You can ask them how they prefer to be addressed.

A. are called
B. being called
C. be called
D. called

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蜗杆传动在单位时间内的发热量,是通过( )来进行计算的。

A. 传递的功率P1与传动效率
B. 蜗杆的转速n1与传动效率
C. 传动比i和传动效率
D. 润滑油的黏度和滑动速度vs

在蜗杆传动设计中,必须进行蜗杆轮齿的强度计算。 A. √B. ×

A. 对
B. 错

31. I believe the city can improve its traffic condition by ( offer) ___ more options of transportation.32. careerdevelopment （general）_Refers to personal efforts by employeeTo learn and develop new skills.33.I'm writing to convey my warm congratulations on your (appoint)___To the head of the board.34.According to the report (publish) _Yesterday,More young people are pouring into the city to look for a job.35.The contract won't come into effort until it (sign) ___ bythe legal representatives of both parties.

在三相异步电动机的正反转控制电路中，正转接触器与反转接触器间的互锁环节功能是()。A、防止电动机同时正转和反转B、防止误操作时电源短路C、实现电动机过载保护

A
B
C