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八年级数学：怎么求2AD+DC的最小值？胡不归问题中考题，学浪计划
八年级数学：怎么求2AD+DC的最小值？胡不归问题，2020中考真题
初中数学：几何最值，将军饮马，费马点，胡不归，隐形圆，阿氏圆88/333
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