⊙O的两条弦AB、CD相交于点P,已知AP=2cm,BP=6cm,CP:PD=1:3,则CD=______. ⊙O的两条弦AB、CD相交于点P,已知AP=2cm,BP=6cm,CP:PD=1:3,则CD=______. 发布时间:2025-09-01 14:52:27