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【简答题】
一偏心、尖端、移动推杆凸轮机构（图示），凸轮的一段廓线为渐开线，其基圆半径【图片】等于偏心距，当凸轮以等角速度【图片】转动时，推杆上升速度为 。推杆以变速上升还是等速上升？ 。【图片】
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反馈参考答案：
举一反三
【简答题】I decided to buy the books that lwanted when it was 50’clock． I__________decide'which books tobuy__________it Was 50’clock．
【单选题】I never know _____ when I go on a trip. A. what clothes should take B. what clothes to take C. what clothes will I take D. I take what clothes
A.
what clothes should take
B.
what clothes to take
C.
what clothes will I take
D.
I take what clothes
【单选题】If I had more time, I would ______golf as a hobby.
A.
take in
B.
take on
C.
take up
D.
take over
【单选题】下列选项中,最适合用于刮涂腻子前打磨羽状边的是( )。--[1分]
A.
P240 砂纸配合双动作打磨机
B.
P320砂纸配合单动作打磨机
C.
P120砂纸配合双动作打磨机
【单选题】Now, boys,I'll________the story where I stopped yesterday . [ ]
A.
take up
B.
take on
C.
take in
D.
take over
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