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如图,已知⊙O的直径与弦CD相交于点E,CE=8cm,DE=3cm,EB=2cm...
如图,已知⊙O的直径与弦CD相交于点E,CE=8cm,DE=3cm,EB=2cm,则⊙O的半径的长是( )
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A.6cm
B.7cm
C.8cm
D.9cm
考点分析:
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