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(2002•哈尔滨)如图,梯形ABCD中,AD∥BC,中位线EF分别与BD、AC...
(2002•哈尔滨)如图,梯形ABCD中,AD∥BC,中位线EF分别与BD、AC交于点G、H.若AD=6,BC=10,则GH=
.
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