题干
-- Shall we go on a picnic this weekend?
-- Good idea, unless it .
A：rains
B：will rain
C：doesn't rain
D：won't rain
答案(点此获取答案解析）
A
-- Shall we go on a picnic this weekend?
-- Good idea, unless it .
A：rains
B：will rain
C：doesn't rain
D：won't rain
2NH3(g)。当反应达到平衡时NH3为n mol。在与上述完全相同的容器中，保持温度不变，若平衡时NH3仍为n mol，则下列组合中不正确的是( )