如图，BD是⊙O的直径，∠CBD=30°，则∠A的度数为

题干

如图，BD是⊙O的直径，∠CBD=30°，则∠A的度数为（　　）

A：30°

B：45°

C：60°

D：75°

上一题下一题 0.0难度选择题更新时间:2019-11-06 04:32:24

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C

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