A:what, whe
B:that, which
C:what, which
D:which, that
一束光从介质A进入介质B,方向如图所示,由图可知,A、B两种介质相比( )
要求:语句通顺,注意动词形式。
提示词:get up go to bed brush one's teeth do one's homework
I have some good habits.
请选出下列句子说法正确的一项( )