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(2001•南京)如图所示,四边形ABCD为⊙O的内接四边形,E为AB延长线的上...
(2001•南京)如图所示,四边形ABCD为⊙O的内接四边形,E为AB延长线的上一点,∠CBE=40°,则∠AOC等于( )
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A.20°
B.40°
C.80°
D.100°
考点分析:
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