A：可用溴水鉴别直馏汽油和裂化汽油
B：煤的液化和气化都是物理变化
C：煤中含有苯及其同系物，所以煤是工业上获得苯的重要来源
D：石油分馏获得的石油气中，含甲烷、乙烷、乙烯等气态烃
① →脱分化 ② →再分化 ③→④
甘油和氨基酸分别是由什么营养物质分解而来？（ ）
A: Hello, Mike.
B: Hello, Lucy.
A: ____
B: I'm feeling better now.
B: He said I had got a bad cold.
B: No, I can't. I have to stay in bed for a few days.
B: Could you help me with my lessons when I am well?
A: Sure. ____
B: Thank you.
A. What's wrong with you?
B. I hope you'll be better soon.
C. Can you come to school today?
D. How are you today?
E. I'm sorry to hear that.
F. What did the doctor say?
G. Are you feeling better now?
