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(2003•长沙)如图,△ABC中,D,E分别是AB,AC上的点,DE∥BC,D...
(2003•长沙)如图,△ABC中,D,E分别是AB,AC上的点,DE∥BC,DE=1,BC=3,AB=6,则AD的长为( )
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A.1
B.1.5
C.2
D.2.5
考点分析:
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