题目

so her English is very good. A . Jane doesn't like English, B . Jane doesn't like English at all, C . Jane likes English a lot, D . Jane likes English a little, 答案：C一定温度下，可逆反应：A(g)+3B(g)  2C(g)达到限度的标志是 [     ]A．C的生成速率与A的消耗速率相等 B．单位时间生成n molA，同时生成3n mol B C．A、B、C的浓度不再变化 D．A、B、C的分子数之比为1:3:2