—Does the tiger eat fruit?
—No, .
A:they do
B:it doesn't
C:they don't
D:they aren't
在△ABC中,AB=AC,过点A的直线与其外接圆交于点P,交BC延长线于点D.
(1)求证:PCPA=PDBD;
(2)若AC=3,求AP•AD的值.
下列说法错误的是( )