凸轮的基圆半径越小,则机构尺寸(),但过小的基圆半径会导致压力角(),使凸轮机构发生( )。
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We couldn't have passed the final examination ______ your help.
A. but for
B. without
C. if it had not been for
D. all of the above
It's about time that you _____ yourself a regular job. You can't go on like that.
A. found
B. find
C. will find
D. would find
Do you think that these pants go _____ this blouse?