读我国局部铁路线示意图,下列说法正确的是
A.沿陇海线可以直达乌鲁木齐市
B.①铁路与陇海线相会于徐州
C.②城市是宝成铁路线的起点
D.③城市位于京九铁路线上
答案:C
---Can I help you?
---Yes. I'd like a ticket to Mount Emei. Can you tell me ______ take to get there? [ ]
A. how soon will it
B. how soon it will
C. how long it will
D. how long will it
离心泵正常运转时,对于转速为1500转/分钟的轴承其振动值应()。
A.≤0.05mm
B.≤0.06mm
C.≤0.08mm
D.≤0.09mm