固定容积为2L的密闭容器中发生反应xA（g）+yB（g）⇌zC（g），图I表示t℃时容器中各物质的量随时间的变化关系，图II表示平衡常数K随温度变化的关系．结合图象判断，下列结论正确的是（　　）

宪法规定了国家生活中的具体问题。（   ）

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. 

已知F₁、F₂分别是双曲线$\frac{x^2}{4}-\frac{y^2}{b^2}=1\left(b>0\right)$的左、右焦点，P为双曲线上的一点，若∠F₁PF₂=120°，且△F₁PF₂的三边长成等差数列，则双曲线的渐近线的斜率是（　　）