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八年级数学：若分式中的x、y都扩大3倍，那么它的值扩大多少倍？
八年级数学：若分式中的x、y都扩大3倍，那么它的值扩大多少倍？
八年级数学：分式的定义和化简，解分式方程，应用题，培优专题286/333
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