题干
--Are you sometimes a little tired and in class?
--Yes, because I often stay up late at night.
A：sleep
B：asleep
C：sleepy
D：sleeping
答案(点此获取答案解析）
C
nC(g)△H＞0生成物C的浓度随压强变化并建立平衡的关系图,则n值与压强p1、p2的关系正确的是 （ ）