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如图,点A,B是⊙O上两点,AB=10,点P是⊙O上的动点(P与A,B不重合),...
如图,点A,B是⊙O上两点,AB=10,点P是⊙O上的动点(P与A,B不重合),连接AP,PB,过点O分别作OE⊥AP于E,OF⊥PB于F,则EF=
.
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