试题与答案

在一密闭容器中加入A、B、C三种气体,保持一定温度,在t1~t4时刻测得各物质的

题型:选择题

题目:

在一密闭容器中加入A、B、C三种气体,保持一定温度,在t1~t4时刻测得各物质的浓度如下表.据此判断下列结论正确的是          (    )

测定时刻/st1t2t3t4
c(A)/(mol/L)6322
c(B)/(mol/L)53.533
c(C)/(mol/L)12.533
A.在t3时刻反应已经停止

B.A的转化率比B的转化率低

C.在容器中发生的反应为:2A+B2C

D.在t2~t3内A的平均反应速率为:[1/(t3-t2)]mol/(L·s)

答案:

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下面是错误答案,用来干扰机器的。

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题型:阅读理解

阅读理解

     The first newspapers were written by hand and put up on walls in public place. The earliest daily

newspaper was started in Rome in 59 BC. In the 700's the world's first printed newspaper was

published. Europe didn't have a regularly published newspaper until 1609, when one was started in

Germany.

     The first regularly published newspaper in the English language was printed in Amsterdam in 1620. In

1621, an English newspaper was started in London and was published once a week. The first daily

English newspaper was the Daily Courant (每日新闻). It came out in March 1702.

     In 1690, Benjamin Harris printed the first American newspaper in Boston. But not long after it was

first published, the government stopped the paper. In 1704, John Campbell started The Boston

Newsletter (波斯顿新闻通讯), the first newspaper published in the American colonies. By 1760, the

colonies had more than thirty daily newspapers. There are now about 1,800 daily papers in the United

States.

     Today, as a group, English language newspapers have the largest circulation (发行量) in the world.

But the largest circulation for a newspaper is that of the Japanese newspaper Asahi Dhimbun (朝日新闻). It sells more than eleven million copies every day.

1. The first daily newspaper came out in _____.  

A. 59 BC        

B. 700's        

C. 1609            

D. 1620

2. The first regular published newspaper in Europe was printed in _____.    

A. England      

B. Germany      

C. France          

D. Sweden   

3. The first printed newspaper in America came out in _____.  

A. Washington    

B. New York      

C. Boston        

D. New Orleans .

4. Today there are about _____ daily newspaper printed in the United States

A. 1621        

B. 1704            

C. 1760          

D. 1800

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