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在蜗杆传动设计中,必须进行蜗杆轮齿的强度计算。 A. √B. ×
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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
将二进制数1001011.01转换成相应的八进制数
中国共产党是中国特色社会主义事业的( )。
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