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如图,在Rt△ABC中,∠ACB=90°,∠A=30°,BC=1,以边AC上一点O为圆心,OA为半径的⊙O经过点B. (1)求⊙O的半径; (2)点P为劣弧AB中点,作PQ⊥AC,垂足为Q,求O...
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