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【单选题】
曲线y=x3上取一点P，过P的切线与该曲线交于Q，则曲线在Q处的切线斜率恰好是P处切线斜率的()倍。A.
1
B.
2
C.
3
D.
4
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举一反三
【单选题】There seemed little hope that the explorer, ______in the tropical forest, would find his way out.
A.
having been deserted
B.
having deserted
C.
to have been deserted
D.
to be deserted
【单选题】The little girl showed no anxiety before the competition. She seemed _____ for it pretty well. A
A.
26. The little girl showed no anxiety before the competition. She seemed _____ for it pretty well. A．to prepare
B.
to have prepared
C.
having prepared
D.
to be preparing
【简答题】___________ seemed a little bit ____________ (a).
【简答题】当连杆弯扭变形并存时,应( )
【简答题】当连杆弯、扭变形并存时，应先校正（），后校正（）。
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