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【单选题】
下列、轴配合中、不用过渡配合的是( ),A.
既要求对中,又要拆卸方便(
B.
工作时有相对运动
C.
保持静止或传递载荷的可拆结合
D.
要求定心好,静载由键传递
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举一反三
【判断题】步进电动机每输入一个控制脉冲，定子绕组就换接一次，输出轴就转过一个步距角，这种控制方式叫角度控制。如果输入脉冲的频率很高，步进电动机就不是一步步的转动，而是连续转动，这种控制方式叫速度控制。
A.
正确
B.
错误
【单选题】— Please don''t make a noise . — ____ . I''ll be as quiet as a mouse .
A.
Yes , I won''t
B.
No , I won''t
C.
No , I''ll
D.
Yes , I will
【简答题】棉制的粗松螺旋花线
【单选题】听力原文：W Hi, Sarah, it's Meg. I'm working on the presentation and I don't think I'll be able to finish my part by Monday morning. Do you think I could get an extension? W How much more work do you have ...
A.
A report
B.
A presentation
C.
A business letter
D.
A press release
【单选题】—If you don’t hurry, I’ll go without you. ---_________ I’m nearly ready.
A.
I don’t get it
B.
Get a move on
C.
That’s a good point
D.
Hang on a minute
【简答题】纯棉制的粗松螺旋花线
【单选题】— I'll fly to Shanghai on business next Friday. — ______. [ ]
A.
That's very nice of you.
B.
I don't think so.
C.
Can't you go?
D.
Have a good trip.
【单选题】— Kate is in hospital. — Oh, really? I ______. ______ visit her. [ ]
A.
don't know, I'll go
B.
don't know, I'll go and
C.
didn't know, I'm going to go and
D.
didn't know, I'll go and
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