题干
（2015·湖北） This meeting room is a non-smoking area. I would like to warn you _____ that if you smoked here you would be fined.
A：in advance
B：in detail
C：in total
D：in general
答案(点此获取答案解析）
A
2C（g）的V—t图像如下左图，若其他条件都不变，只是在反应前加入合适的催化剂，则其V—t图像如下右图。
