问题 填空题

(5分)汽车尾气(含烃类、CO、NO与SO2等)是城市主要污染源之一,治理的办法之一是在汽车排气管上装催化转化器,它使NO与CO反应生成可参与大气生态循环的无毒气体,反应原理:2NO(g)+2CO(g)===N2(g)+2CO2(g),在298 K、100 kPa下,ΔH=-113 kJ·mol-1,ΔS=-145 J·(mol·K)-1

(1)为了提高该反应的速率和NO的转化率,采取的正确措施为           

A.加催化剂同时升高温度

B.加催化剂同时增大压强

C.升高温度同时充入N2

D.降低温度同时增大压强(2)若升高温度,则该反应的平衡常数         (填“增大”、“减小”或“不变”).

(3)判断该条件下反应           (填能、不能)自发.

答案

(1)B(1分) (2)减小(2分)(3)能(2分)

完形填空
完形填空。
     As a student, you must   1   a lot of interesting books. Most of the books come from the school   2  , I am
sure. Perhaps you also get books from the public (公共) library in your town. Then books are sometimes given
to you as presents by your parents or friends, I think. Besides (除此之外), if you like reading and want to learn   3  . I am sure that you buy books   4  . Do you know   5   books are made? Well, after a book is written, it
passes   6   the hands of many different workers. Each one   7   very carefully, for there must not be any   8   
in the book. Different people read many times before it is finished. Millions of books are printed (印刷) in our
country every year. So people can get   9   to read. Now may I ask you a  10  ? How well do you take   11   of
books? What have you learned about the care of books? Perhaps you bought yourselves some   12   books. Do
you put paper on them? Do you open   13  ? Sometimes new books break (破) along the back if you open  14   
suddenly in the middle. I hope that you don't   15   the pages carelessly. If you do, you may tear (撕) them.
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