如图,矩形ABCD的对角线相交于点O,AE平分∠BAD交BC于E,若∠CAE=15°,则∠AEO=( )
A:30°
B:25°
C:22.5°
D:20
In the UK, a lady usually doesn't like to be asked ___.
____
在实验设计中,下列不能作为对照的一组是( )
读下面某时期世界贸易图,从中可以看出( )