--- gloves are these?
--- They look like Mike's. You can ask him.
A:Who
B:What
C:Which
D:Whose
如图,AB是圆O的直径,弦CD⊥AB于点E,点P在圆O上且∠1=∠C.
(1)求证:CB∥PD;
(2)若BC=3,BE=2,求CD的长.
2010年7月一位老者动情地写下了这样一首诗:“一声惊雷震九天,南湖八十九年前。唤起工农千百万,同心干,红旗漫卷映河山。”这首诗赞颂的历史事件是( )