设备的固定结合面不允许有油迹,转动或滑动部位允许有油迹,但擦干后要在()h内不滴油。
A、1
B、2
C、3
D、4
参考答案:A
用所给词的适当形式填空.(1´10=10)
小题1:The bridge is famous . It _______ (build) thousands of years ago
小题2:E-mail English is a kind of _____ (write) English, not spoken English .
小题3:_______ you ever______ (sing) a song in front of other people?
Yes , I _______ one last term .
小题4:Danny writes __________ (careful) of all the boys.
小题5:He studies science very hard because he wants to be a _________ (science).
小题6:Swimming makes me __________ (health) than before.
小题7:It’s your turn___________ (take) out the trash.
小题8:Tina is looking forward to _________(spend) holidays with her family in Paris .
当仪表调节器的输入偏差大于零时,输出信号增加,则该调节器为()的调节器。