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【判断题】
铣削交错齿三面刃铣刀螺旋齿槽时，应使螺旋槽靠铣刀小角度锥面刃或铣刀端面刃。( )A.
正确
B.
错误
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【单选题】—The problem isn't difficult for the children to work out, is it？ —_____ . Perhaps they should have been given a more difficult one.
A.
Yes, it is
B.
Yes, it isn't
C.
No, it is
D.
No, it isn't
【简答题】Perhaps you should __________some sports activities to relax. (参加)
【单选题】_____ you are unable to answer, perhaps we should ask someone else.
A.
If
B.
Since
C.
Although
D.
When
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【单选题】______ you are unable to answer, perhaps we should ask someone else.
A.
Since
B.
If
C.
When
D.
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A.
急性肺脓肿
B.
干酪性肺炎
C.
葡萄球菌肺炎
D.
支原体肺炎
E.
链球菌肺炎
【单选题】______ you are unable to answer, perhaps we should ask someone else.
A.
Thus
B.
Since
C.
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D.
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