在密闭容器中充入一定量的NO2，发生反应2NO2(g) 
N2O4(g)△H=﹣57kJ/mol，在温度为T1、T2时，平衡体系中NO2的体积分数随压强变化的曲线如下图所示。下列说法正确的是
| A．a、c两点的反应速率：a>c |
| B．a、b两点的转化率：a<b |
| C．a、c两点气体的颜色：a深，c浅 |
| D．由a点到b点，可以用加热的方法 |
相关试题
I’m sure that your letter will get______ attention. They know you’re waiting for the reply. 
| A．continued | B．immediate | C．careful | D．general |
All the dishes in this menu, ______ otherwise stated, will serve two to three people. 
| A．as | B．if | C．though | D．unless |
The children loved their day trip, and they enjoyed the horse ride ______.
| A．most | B．more | C．less | D．little |
Progress______ so far very good and we are sure that the work will be finished on time.
| A．was | B．had been | C．has been | D．will be |
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