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八年级数学：怎么求BD的最小值？熟练几个基础考点，这题很简单
八年级数学：怎么求BD的最小值？熟练几个基础考点，这题很简单
初中数学：几何最值，将军饮马，费马点，胡不归，隐形圆，阿氏圆120/333
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