2．下列化学用语或模型图表示正确的是

1．用于净化汽车尾气的反应：2NO(g)＋2CO(g)2CO₂(g)＋N₂(g)，已知该反应速率极慢，570K时平衡常数为1×10⁵⁹。下列说法正确的是

A．装有尾气净化装置的汽车排出的气体中不再含有NO或CO

B．提高尾气净化效率的常用方法是升高温度

C．提高尾气净化效率的最佳途径是研制高效催化剂

D．570K时该反应正向进行的程度很大，故使用催化剂并无实际意义

20．写在作文纸上

19．（3分）

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七、（40分）

18．（3分）

①                ②                 ③                            

④                ⑤                 ⑥                                                 

17．（6分）________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________                                                       

六、（6分）

16．（4分）__________________________________________________________________________________________________________________________________________________________________________________________                                                             

15．（4分）__________________________________________________________________________________________________________________________________________________________________________________________                                                        

14．（2分）____________________________________________________________________________________________________________________________                                                          

13．（6分）（选第二组者依次答在横线上即可）

①                           ②                         

③________________________                                                

④________________________                                                 

五、（16分）