平屋顶上的横向排水坡度一般为（）。
A.1%
B.2%-3%
C.2.5%
D.3%
参考答案：B
Read and complete. 补全对话。
A: Are you ?
B: Yes, I am very hungry. I want to eat a pizza.
A: I want to eat a , too. I like on it. Do you like pepper, too?
B: Yes. Would you like some juice?
A: No, . I'd like some milk.
B: You don't like , but I like it.
形状因子S
