- I can hardly believe my eyes. Is that you, Joy?
- Yes. It has been almost ten years we were together.
A:since
B:before
C:until
D:after
对于反应N2(g)+3H2(g)═2NH3(g),下列化学反应速率的表示中,所表示的反应速率最快的是( )
2000年,***同志参加了亚非峰会和亚非会议50周年纪念活动。50年前的第一次亚非会议的显著特点是( )