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八年级数学：矩形ABCD中，怎么求BC的最小值？做起来有真点难度
八年级数学：矩形ABCD中，怎么求BC的最小值？做起来有真点难度
初中数学：几何最值，将军饮马，费马点，胡不归，隐形圆，阿氏圆100/333
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