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【简答题】
车削某工件内,毛坯底直径为φ30mm,要φ40mm;先粗φ39mm;然后进行一次精车;精车的进给量为0.15mm/r,所选的切削速度为80m/min。则精车的背吃刀量为____,精工件转速应为____。 ( 带单位,除不尽时保留两位小数) (要求做题步骤写在作业本上上交)
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举一反三
【单选题】— I thought you were proud of the coat I ________. — I'm afraid not. You'd better change it for another. [ ]
A.
would wear
B.
had worn
C.
wore
D.
wear
【单选题】听力原文：M: If you're not too busy tonight, how about catching a movie? W: I thought you had to work on that big presentation you are making in front of the board members tomorrow. Have you already prepar...
A.
Today.
B.
Tomorrow.
C.
This Friday.
D.
Next week.
【单选题】I thought you 1ike somethjngto read ， so I have brought you some books ．
A.
． may
B.
． might
C.
． could
D.
． must
【单选题】—Did you take enough money with you? —No, I needed ______ I thought I would.
A.
not so much as
B.
as much as
C.
much more than
D.
much less than
【单选题】I had never expected you to turn _______ at the meeting. I thought you were in Shanghai。
A.
around
B.
on
C.
in
D.
up
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