“开辟荆榛，千秋功业；驱除荷虏，一代英雄。”是现代著名学者郭沫若对古代一位民族英雄的赞词。这位民族英雄是下列中的哪一位（    ）

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. 

2分____150秒   50分____1小时   3分____180秒

叩击人膝盖下的韧带时，会发生____ 反射．这种反射属于____ 反射．

以下肺泡适于与血液进行气体交换的特点，不正确的是（　　）