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数学7上：甲车要10小时，乙车要8小时，甲车速度比乙车，选哪个？
数学7上：甲车要10小时，乙车要8小时，甲车速度比乙车，选哪个？
七年级数学，一元一次方程应用题，各种类别的题型，这里都有详解271/581
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