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如图,在△ABC中,∠C=90°,∠BAC的平分线交BC于点D,点O在AB上,以点O为圆心,OA为半径的圆恰好经过点D,分别交AC,AB于点E,F. (1)试判断直线BC与⊙O的位置关系,并说明理...
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