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如图,⊙O的直径AB=10cm,弦CD⊥AB,垂足为P.若OP:OB=3:5,则...
如图,⊙O的直径AB=10cm,弦CD⊥AB,垂足为P.若OP:OB=3:5,则CD的长为( )
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A.6cm
B.4cm
C.8cm
D.10cm
考点分析:
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