为了形象地说明宇宙大爆炸，课本上将一个黏有小金属粒的气球看着宇宙，____ 看成是宇宙中的天体，气球膨胀时，任一小金属粒都在离它远去．这里运用的是主要一种思维方法____ （等效法/类比法/转换法）．

媒体报道称：麻雀的白化现象与人类白化病类似，是由遗传物质改变引起的．关于麻雀白化现象叙述正确的是（   ）

补全对话。

A. She is a doctor. 

B. How does she go to work?

C. What does your father do?

D. I want to be a pilot. 

E. Do you want to be a pilot, too? 

Bill: Hi! Mike! ____       

Mike: He is a scientist.  

Bill: Does he like his job?           

Mike: Yes, but he's very busy.

Bill: What about your mother?      

Mike: ____ 

Bill: Oh, doctors always work hard.  

Mike: Yes, but it is interesting. 

Bill: ____                

Mike: She goes to work by bus. 

Bill: What are you going to do when you grow up (长大)? 

Mike: ____

Bill: It's cool.      

Mike: ____   

Bill: No, I want to be a writer.