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数学8年级培优题：连比相等，设K值，是解决这一类题型的一般方法
数学8年级培优题：连比相等，设K值，是解决这一类题型的一般方法
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158/333
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