题干
Hurry up, Mike. You must get to the airport an hour before the plane________.
A：gets off
B：turns off
C：puts off
D：takes off
答案(点此获取答案解析）
D
Hurry up, Mike. You must get to the airport an hour before the plane________.
A：gets off
B：turns off
C：puts off
D：takes off
2SO3(g) ∆H<0的正反应速率随时间的变化情况，试根据此曲线判断下列说法可能正确的是（ ）
