数学初二最短路径问题 一道初二数学轴对称最短路径问题，很急，万分感谢！
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解：记河的两岸为l，l'，将直线l平移到l'的位置，
则点A平移到A'，连接A'B交l'与D，过D作DC⊥l与C，则桥架在CD处就可以了．
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