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(2002•兰州)如图在△ABC中∠A=70°,⊙O截△ABC的三条边所得的弦长...
(2002•兰州)如图在△ABC中∠A=70°,⊙O截△ABC的三条边所得的弦长相等,则∠BOC=( )
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A.140°
B.135°
C.130°
D.125°
考点分析:
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