如图，四边形OABC的四个顶点坐标分别为O（0，0），A（8，0），B（4，4），C（0，4），直线l：y=x+b保持与四边形OABC的边交于点M、N（M在折线AOC上，N在折线ABC上）．设四边形OABC在l右下方部分的面积为S₁，在l左上方部分的面积为S₂，记S为S₁、S₂的差（S≥0）．

“人是善变无常的、优柔寡断的、浅薄无知的、容易被操弄的，而政治是一种精细的艺术，需要智慧和良好判断，这不是每个公民都拥有的特质。”这批判的是（    ）

从方框内选择合适的句子完成下面的对话。

A. Please show me the white one.

B. Can I help you?

C. Yes. I like it.

D. I'll get a hat for her, too.

E. What color would you like?

A: ____    

B: Yes. I want to buy a dress for my daughter. It's a birthday gift for her.

A: ____

B: Do you have a pink one? My daughter likes pink.

A: Yes. What about this one?

B: Yes, it's very nice. Do you have girls'hats?

 ____

A: Yes, here they are.____  

B: ____    

A: OK, here you are. It's nice, too.

There are two       and five       in the zoo.