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八年级数学：怎么求PN+NM+MQ的最小值？将军饮马问题，学浪计划
八年级数学：怎么求PN+NM+MQ的最小值？将军饮马问题，经典变式题
初中数学：几何最值，将军饮马，费马点，胡不归，隐形圆，阿氏圆92/333
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