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如图,已知AB为⊙O的直径,点C在⊙O上,∠C=15°,则∠BOC的度数为( )...
如图,已知AB为⊙O的直径,点C在⊙O上,∠C=15°,则∠BOC的度数为( )
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A.15°
B.30°
C.45°
D.60°
考点分析:
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