题干
As we can see, the work can’t be finished by only one person, so let’s ______．
A：take a tur
B：by tur
C：in tur
D：take tur
答案(点此获取答案解析）
D
A：take a tur
B：by tur
C：in tur
D：take tur
4NO+6H2O在5L的密闭容器中进行，半分钟后，NO的物质的量增加了0.3mol，则此反应的化学速率v为( )
