题干
— When you to Beijing?
— Last month.
A：do; go
B：does; go
C：did; go
D：did; went
答案(点此获取答案解析）
C
2B(g)+E(g) △H>0, 达到平衡时，要使正反应速率降低，A的浓度增大，应采取的措施是