When I got home, I saw my father _________TV.
A:watched
B:watches
C:watching
D:to watch
甲、乙两个圆,甲圆半径3cm,乙圆半径4cm。甲、乙两圆直径的比是____,甲、乙两圆周长的比是____,甲、乙两圆面积的比是____。