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初中数学：P是平面内动点，怎么求PA+PD的最小值？将军饮马最小值
初中数学：P是平面内动点，怎么求PA+PD的最小值？将军饮马最小值
初中数学：几何最值，将军饮马，费马点，胡不归，隐形圆，阿氏圆298/333
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