图中的两个三角形是位似图形,它们的位似中心是( )
A:点P
B:点D
C:点M
D:点N
秦始皇“焚书坑儒”和汉武帝“罢黜百家,独尊儒术”的共同点是( )
To make a beautiful campus, please ____ ____that rubbish is thrown into dustbins.