补全对话。
A: Good evening.____
B: Yes, please. I want a pair of sneakers (运动鞋).
A:____
B: No, I want some light (轻的) ones.
A: What about this pair? They're light and they are fit for (适合) playing sports.
B: This pair looks nice. ____
A: What color do you like?
B: Brown or blue.
A: Here are the brown ones.
B: OK.____
A: 75 dollars.
B: I'll take them and here is the money.
A:____See you next time.

A. Can I help you? B. How much are they? C. Do you like these ones? D. The red ones look nice. E. But I don't like the color. F. But I don't like brown sneakers. G. Here are your sneakers and thanks for coming.

名著阅读。

如图说明细胞能正常完成各项生命活动的前提条件是（  ）

这是我朋友，他很淘气。

小明家买了一个既美观又实用的茶几，茶几的中间是一个鱼缸，茶几摆放在客厅地面是上，如图，其部分参数如表，取g=10N/kg．