题目

 M: Air pollution is so bad in this city. I think the government should stop people from driving cars on certain days. W: You have a point. Air pollution is a problem. But not letting people drive on certain days is a bad idea. People have to go to work by car. M:  I’m afraid I don’t agree with you there. Reducing air pollution is really important. People are so used to driving that they don’t think about ways to do things. If we stop them from driving on certain days, maybe they could think of new ways to get around. W:  I see your point. But I still think it wouldn’t be pT℃时，在2L的密闭容器中发生反应：aX（g）+bY（g）?cZ（g），各物质的物质的量随时间变化的关系如图a所示．其他条件相同，温度分别为T1℃、T2℃时发生反应，X的物质的量随时间变化的关系如图b所示．下列叙述不正确的是（ ）A．该反应的正反应是放热反应，且T1＞T2B．X、Y、Z的化学反应速率之比为1：1：2C．图a中反应达到平衡时，Y的转化率为37.5%D．若T1＞T0，则该反应的化学平衡常数K（T1）＜K（T0）