题干
—Lin Tao, do you want to visit the Great Wall, _______?
—Sure, Wang Wei ______ wants to.
A：also; too
B：too; also
C：too; too
D：also; also
答案(点此获取答案解析）
B
2NH3，在5 min内，N2的物质的量浓度由6 mol / L，变为2 mol / L，则用NH3表示该反应在这段时间的平均速率为