A:该反应属于置换反应
B:图中单质的化学式为O2
C:反应后分子总数减少
D:反应后氧原子个数减少
- Which of the two subjects do you like, art or music?
- ______. They are really interesting.
Are there any tall buildings in the village?
如图,方程y=ax+1a表示的直线可能是 ( )