楼地面垫层的作用有( )。
A．找平
B．找坡
C．美观
D．保温
E．耐磨
参考答案：A,B,D
- _________ does your friend Jianjian look like?
- He is tall and has black hair.[ ]
A. How
B. What
C. Which
D. Why
消退。
