题干
– Are you getting a new apartment this year?
– ____ I can’t afford to pay my bills, let alone buy a new apartment.
– ____ I can’t afford to pay my bills, let alone buy a new apartment.
A：Not at all.
B：You must be joking.
C：Are you sure?
D：Good idea!
答案(点此获取答案解析）
B
2NH3(g)的正、逆反应速率可用各反应物或生成物浓度的变化来表示。下列各关系中能说明反应已达到平衡状态的是