问题 选择题

500mL KNO3和Cu(NO3)2的混合溶液中c(NO3-)=6.0 mol/L,用石墨作电极电解此溶液,当通电一段时间后,两极均收集到22.4 L气体(标准状况)。下列说法正确的是 [ ]

A.上述电解过程中共转移2 mol电子

B.原混合溶液中c(K+)为2 mol/L

C.电解得到的Cu的物质的量为0.5 mol

D.电解后溶液中c(H+)为4mol/L

答案

答案:B

阅读理解

阅读理解。

     Every country tends to accept its own way of life as being the normal one and to praise or

criticize others,as they are similar to or different from it.And unfortunately,our picture of the

people and the way of life of other countries is often a distorted (扭曲的) one.

     Here is a great argument in favor of foreign travel and learning foreign languages.It is only

by traveling in a country and getting to know its inhabitants and their language that one can

find out what a country and its people are really like.And how different the knowledge one

gains this way frequently turns out to be from the secondhand information gathered from

other sources! How often we find that the foreigners whom we thought to be such different

people from ourselves are not very different at all!

     Differences between peoples do,of course,exist and,one hopes,will always continue to

do so.The world will be a dull place indeed when all the different nationalities behave exactly

alike,and some people might say that we are rapidly approaching this state of affairs.With the

much greater rapidity (快速) and ease of travel,there might seem to be some truth in this at

least as far as Europe is concerned.However this may be,at least the greater ease of travel

today has revealed (展示) to more people than ever before that the Englishman or Frenchman

or German is not:some different kind of animal from themselves.

1.Every country criticizes ways of life in other countries because they are________.

A.distorted

B.normal

C.similar to each other

D.different from its own

2.One who travels in a foreign country and learns its language will________.

A.find out why its people are different

B.argue in favor of this country and the language

C.know the country and its people better

D.like its inhabitants and their language

3.The knowledge one gains by traveling in a foreign country is often________.

A.from secondhand information

B.gathered from other sources rather than its inhabitants

C.gained from the arguments about the country

D.different from what one had before the travel

4.In this passage,the author wants to say________.

A.differences between peoples will gradually disappear because of the ease of travel

B.differences between peoples do exist even though different nationalities behave exactly alike

C.differences between peoples will continue to exist and the world will be a dull place

D.differences between peoples will not exist as one hopes

判断题