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如图,E、F分别是三棱锥P-ABC的棱AP、BC的中点,PC=10,AB=6,E...
如图,E、F分别是三棱锥P-ABC的棱AP、BC的中点,PC=10,AB=6,EF=7,则异面直线AB与PC所成的角为( )
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A.60°
B.45°
C.0°
D.120°
考点分析:
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