智慧眼（看图选择正确的对话）

         ( )                      (     )                            (     )

                    (     )                            (     )

1. A: Is that your toy train?            

    B: Yes, it's my new toy train

2. A: What's that in English?         

    B: It's a pencil sharpener.

3. A: What's this on the chair?        

    B: It's a book.

4. A: Who's that man?                

    B: He's my uncle, Mr Black.

5. A: Is he your brother?              

    B: Yes, he is.

下列哪一组是形成城市状态的三个重要变量( )

A．人口规模、人口密度、人口异质性

B．人口规模、人口密度、人口流动性

C．人口密度、人口控制方式、人口流动性

D．人口规模、人口控制方式、职业结构