题干
--- I’m sorry that I can’t go to your party tonight.
---- ______ ? Haven’t we agreed on it ?
---- ______ ? Haven’t we agreed on it ?
A：What is it
B：Why don’t you
C：What do you think
D：How is it
答案(点此获取答案解析）
D
2＝ 2NH3的能量变化如图所示，该反应的热化学方程式是