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【单选题】
钻孔循环指令G73与G83循环指令的主要区别是( )。A.
每钻一次,G73退回安全平面,而G83退回固定长度
B.
每钻一次,G73退回固定长度,而G83退回安全平面
C.
每钻一次,G73退回初始平面,而G83退回固定长度
D.
每钻一次,G73退回固定长度,而G83退回初始平面
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【单选题】Only when you have obtained sufficient data _______ come to a sound conclusion. A. can you B. you can C. would you D. you would
A.
can you
B.
you can
C.
would you
D.
you would
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【单选题】— Would you have told him the answer had it been possible? . — I would have, but I _____ so busy then. [ ]
A.
had been
B.
were
C.
was
D.
would be
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【单选题】Only when you have finished your homework _____ go home. [ ]
A.
can you
B.
would you
C.
you will
D.
you can
【简答题】的本质是什么?
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