九上数学题,五小时之内作答1.如图(1)所示,点A,B,C,D把OE分成五等分,AA'//BB'//CC'//DD'//EE',如果OE'=20cm,求B'D'的长.2.如图(2)所示,已知在△ABC中,AD与BE相交于点G,BD:DC=3:1,AG=GD,求BG:GE.注:两题都要
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