对于HB≤350的齿轮面闭式齿轮传动,先按齿面接触强度计算,再()齿轮的弯曲强度
A.估算
B.验算
C.修正
D.比较
参考答案:B
小题1:What is Li Ming’s dream ?
A. To invent a language machine.
B.To visit the moon
C. To go to Beijing
D.To be a doctor小题2:A bad earthquake happened (发生) in Sichuan on ____________.
A.May 12
B.May 22
C.July 2
D.June 12小题3:Who is from Tibet ?
A.Wei Hua
B.Wang Hao
C.Joma
D.Wu Dong小题4:People in Tibet can get to Beijing ____________in about 48 hours now.
A.by train
B.by bus
C.by ship
D.on foot小题5:The best title (标题) for this passage is ____________.
A.A doctor .
B.My dream (梦想)
C.An English teacher
D.My friend
最终消费是指常住单位在一定时期内对于货物和服务的全部最终消费支出,分为居民消费和()
A.集体消费
B.国家消费
C.政府消费
D.企业消费