已知Rt△ABC中，∠C = 90 0，AD平分∠BAC交BC于D，若BC = 3且BD：CD = 1：2，

已知Rt△ABC中，∠C = 90⁰，AD平分∠BAC交BC于D，若BC = 3且BD：CD = 1：2，则D到AB边的距离为（）

A. 1 B. 2 C. 3 D. 无法确定

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已知Rt△ABC中，∠C = 90 0，AD平分∠BAC交BC于D，若BC = 3且BD：CD = 1：2，

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