A:甲状态下的呼吸频率慢于乙状态下的呼吸频率
B:甲状态下的呼吸深度大于乙状态下的呼吸深度
C:甲可能是安静状态,乙可能是剧烈运动状态
D:相同时间内,甲状态的耗氧量小于乙状态的耗氧量
下列关于硫的叙述中,正确的是( )
生男生女是由卵细胞含有的性染色体决定的.(判断对错)
有志与力,而又不随以怠,____,亦不能至也。(王安石《游褒禅山记》)
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?