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(2003•长沙)如图,BD是⊙O的直径,弦AC与BD相交于点E,下列结论一定成...
(2003•长沙)如图,BD是⊙O的直径,弦AC与BD相交于点E,下列结论一定成立的是( )
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A.∠ABD=∠ACD
B.∠ABD=∠AOD
C.∠AOD=∠AED
D.∠ABD=∠BDC
考点分析:
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