题目

---So you gave Mary your dictionary? ---_______．She said she’d return it to me when she could afford her own. A． You bet                 B． My pleasure C． No doubt              D． Not exactly 答案：D汽车尾气净化中的一个反应如下：NO(g)+CO(g)N2(g)+CO2(g) △H＝－373.4kJ·mol－1在恒容的密闭容器中，反应达到平衡后，改变某一条件，下列示意图正确的是（   ）