如图反映的社会现象最早出现在( )
A:秦汉时
B:隋唐时
C:宋元时
D:明清时.
如图,AF是∠BAC的平分线,EF∥AC交AB于点E.若∠1=25°,则∠BAF的度数为( )
—Could I use your computer, Dad?
—Sorry, you _______. I'm going to work on it.