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如图,△ABC内接于⊙O,OD⊥BC于D,∠A=50°,则∠OCD的度数是( )...
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如图,△ABC内接于⊙O,OD⊥BC于D,∠A=50°,则∠OCD的度数是( )
A.40°
B.45°
C.50°
D.60°
考点分析:
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