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For years , many people would not believe that smoke could attack so many parts of the body in so many ways . Study shows , however , that tobacco isn’t one single thing .  At least 60% of it is gas—20 different kinds of gas . And one of these is the deadly carbon monoxide (CO) (一氧化碳).
In factories , the amount of this gas in the air is measured , and it must be kept under fixed , safe level . But there is 640 times this safe amount in cigarette smoke .
Oxygen is carried through your body by the red blood cells . But this poison gas , CO, will get to the blood cells before the oxygen can . So , if you smoke your blood carries five to ten times more of this deadly gas than is normal . To make up for this , your body must make more red cells .
The oxygen in your blood passes into your tissues(组织). But here again CO makes trouble . It keeps the oxygen from passing into your tissues as fast as it should . Because of this , cigarette country is always about 8000 feet above sea level . Someone who smokes and lives at sea level gets as little oxygen as a nonsmoker at an altitude(高度)of nearly two miles .This happens to everyone who smokes , no matter how old or how young . Anyone who competes in sports can tell you that those who smoke run out of breath more quickly than those who do not .
1.The gas amount in cigarette smoke is______________.
A.640 times higher than the gas safe levels in factories
B.640 times lower than the gas safe levels in factories
C.640 times as much as that in factories
D.as dangerous as that in factories
2.If you smoke , ______________ .
A.your blood carries more oxygen than is normal
B.your blood carries much more CO than is normal
C.you can have five to ten times of blood than usual
D.your blood will be poisonous
3.Those who smoke______________.
A.all live at sea level
B.don’t live at an altitude of two miles
C.breathe as much oxygen as non-smokers
D.only get the same amount of oxygen at the sea level as non-smokers at an altitude of nearly 2 miles
4.Smokers are______________.
A.easily hurt              B.easily excited      C.easily tired         D.healthy
答案

小题1:C
小题2:B
小题3:D
小题4:C
解析

核心考点
试题【For years , many people would not believe that smoke could attack so many parts 】;主要考察你对题材分类等知识点的理解。[详细]
举一反三

完形填空(共20小题;每小题1.5分,满分 30分)
阅读下面短文,从短文后所给各题的四个选项(A、B、C、和D)中,选出可以填入空白处的最佳选项,并在答题卡上将该项涂黑
Traveling in Vietnam was like visiting a mysterious neighbor. You have lived next door to each other for years but know very    1_ about what happened on   2__ side of the fence.
I traveled there last August. A(n)   3   180-kilometre trip from a Chinese border town to Hanoi, the capital of Vietman,   4    an adventurous eight hours. That’s   5    the country still doesn’t have a modern expressway system. The major passage going through the country is only a two—way road.    6    , many areas are mountainous.
Vietnamese drivers are   7    and fearless. They compete with each other at full speeds no matter how scared the   8    feel. When the bus shook us violently for the hundredth time, the driver made a   9   to make us feel better. “See, this is just a(n)   10   Vietnamese people give you, a free massage(按摩) service.”
It was midnight   11   I reached that hotel. Switching on television, I was   12   by something: All the __13__ in the TV plays spoke in the same voice.   14   , modern Korean plays and historical Chinese plays are   15   with the Vietnamese. But it seemed they didn’t have enough   16   to dub(为…配音) all these programs. So, the same boring woman appears 17   every TV play to speak for the roles. The next morning when I opened the window, I found myself in a huge “   18   ”. The buildings in the streets were __19  in all kinds of colors you can imagine. Vietnamese are allowed to   20   their houses as they like. Each one was different. The large number of colors brought the city alive.
1. A. little                     B. much                C. a lot                         D. few
2. A. another      B. other        C. either              D. the other
3. A. long        B. simple       C. pleasant            D. easy
4. A. took              B. spent        C. paid              D .devoted 
5. A. why              B. when        C. because            D. where
6. A. Therefore         B.However       C. Also               D. Otherwise
7. A. wonderful   B. impatient            C. careful             D. helpless
8. A. passengers         B. policemen    C. drivers             D. passers-by
9. A. story      B. joke                C. promise            D. statement
10. A. gift             B. pleasure       C. competition        D. surprise
11. A. that             B. until          C. when             D. while
12. A. excited           B. embarrassed    C. disappointed        D. amazed
13. A. actresses         B. actors         C. characters          D. channels
14. A. At present B. To be honest    C. Sure enough         D. Of course
15. A. satisfied          B. received       C. content             D. popular
16. A. time             B. budget         C. people              D. space
17. A. beside           B. under         C. over               D. behind
18. A. film             B. garden              C. book               D. cup
19. A. put              B. set          C. dressed             D. filled
20. A. rent      B. make        C. live                D. paint
题型:不详难度:| 查看答案

The desire to make explorations is born with man. Wherever his imagination goes, man also has a strong wish to go. A large part of human history is connected with the exploration of the world in which we live. Again and again people have set out with surprising courage and patience to look into unknown regions and lands to see what had not yet been seen, to make known the unknown. With kites, balloons and aircraft they left the ground to pass through the lower atmosphere. Now the outer space receives their attention.
Why should man take the trouble of exploring space? It is hard to list the specific practical benefits that will result in. But one knows, from past experience in other areas, that man will surely see and discover new things in space that will increase our scientific knowledge, and this new knowledge will find its way into valuable practical uses. What we learn about man himself, from his experience in space, and from the effects of space and the space flight environment on him, will be extremely valuable. The new techniques developed to carry out the exploration of space, and to keep man alive in space, will certainly find practical uses in everyday life in some way. The areas that will benefit are manifold. They include communication, generation of power, transportation and travel, food production, materials, fuels and many others. But to say exactly what the practical results will be is almost impossible.
1. The main idea of the first paragraph is that __________.
A. man often goes wherever his dreams go
B. man desires to explore what is unknown
C. man is no longer interested in the study of the land and sea now
D. man"s history is his exploration of the world
2. The word "manifold" in the second paragraph probably means ________ .
A. of value       B. of use       C. in a way      D. in many ways
3. The author seems to be in favor of ____.
A. the exploration of space
B. doubting the necessity of the space exploration
C. exploring more in space than in sea         
D. his experience in space
4. In the last sentence of paragraph 2 ,the phrase "practical results" refers to the results ______.
A. that can be made use of
B. that can be learned as knowledge
C. that are obtained from experience         
D. helping us make further exploration
题型:不详难度:| 查看答案

When you enter a crowded room or go on a picnic or to a party, who is the most attractive and appealing person? It is the person who is cheerful, has a smiling face and behaves as if he or she is enjoying every moment of the event! Such people have an optimistic opinion on life.They are the ones with a positive attitude.On the other hand, let’s see that fellow in the corner with a long face.He is most probably thinking about the time and money wasted in having fun.He is a pessimist, one with a negative attitude.
A person with a positive attitude gets on well with the job at hand.He doesn’t worry about what’s gone before or what might happen in the future.If there is a problem, he quickly thinks of ways to solve it.If the problem cannot be solved singly, he seeks help from someone else.He doesn’t feel that it’s beneath his dignity to seek assistance.
When Sonal lost her history notes days before an important examination, she sat down and cried.Then she pulled herself together, borrowed a friend’s notes, worked day and night and managed to copy down whatever she had lost.Sonal passed the exam with flying colors.
It’s just not possible, even for the greatest optimist, to smile all the time and feel good all day.Everyone has a period of blues now and then, when everything seems sad and without cheer.But once you develop a positive attitude, once you realize that life is a series of ups and downs, dark clouds and bright sunshine, in no time at all, you’ve bounced back, ready to welcome the world again with open arms and a huge smile! So from this moment on, keep your face to the sunshine and you’ll never see the shadows.
1.What might be the best title of the passage?
A.To live with an aim in life      B.To be a pessimist or optimist
C.Life is full of ups and downs   D.Develop the positive attitude
2.The case of Sonal suggested that _______.
A.a person can solve the problem once he thinks of a way
B.Sonal made up for what she had lost by working day and night
C.Sonal was a pessimist because he lost her history notes
D.the history notes that she lost was not important for her
3.The underlined phrase bounced back in the last paragraph means_______.
A.moved back and forth     B.jumped up
C.returned to active state    D.came back
4.According to the last paragraph, which of the following statement is TRUE?
A.If you always look at the shadows, you will be in high spirits.
B.It is impossible for a person to be in a good mood all the time.
C.A negative attitude will make you welcome life with a big smile.
D.When someone feels sad, he thinks the world comes to an end.
题型:不详难度:| 查看答案

第三部分:阅读理解(共20小题,每小题2分,满分40分)
Back in the old times, there was an old man, who had spent his life learning many different things. He had traveled to many places as well. “I must be the wisest man in the world.” The man thought to himself. As he grew old, he felt that there was no need for him to learn any longer because of the arrival of the end of life. Every day he spent his time complaining about many things. It seemed that he was satisfied with nothing his life.
One day while he was sitting in the chair, there was a knock on the door. The old man opened the door and found a little girl,whose face was covered with soil. “Can I borrow some fire ?”the girl whispered softly.At that time,matches hadn’t been  invented,and people used to borrow fire from neighbors by loading a bucket (铲子)  with a few hot coals.It was much better than trying to start a fire with sticks.
Not finding a bucket in her hand,the old man asked impatiently , “Well , where’s your bucket ? How are you going to get the coals home ?” However , the girl said she didn’t have one and went to the fireplace .She put a pile of cold ashes into her hand and put the coal on top of the ash heap (灰堆).“Thanks !”she said on her way out.Seeing the girl’s happy and grateful appearance, the man was moved and felt ashamed of himself.“If I can learn something new from a little farm girl,  there must be a lot I still don’t know.I’d better get busy while I still have time.”
1.We can learn from the first paragraph that the old man ____________________
A.failed to know what he needed to do
B.lost confidence in himself
C.lost the fame of the world’s wisest man
D.often expressed his dissatisfaction with life
2.How did the girl change the old man’s opinions ?
A.By solving an old problem in a new way
B.By following the old man’s instructions
C.By pointing out his mistakes politely
D.By helping the old man to make a fire
3.It can be inferred from the underlined part in me last paragraph that the old man would become_______________.
A.more confident                 C.more modest
C.more modest                  D.more intelligent
4.What can we infer from the text ?
A.Failure is the mother of success         B.Action speaks louder than words
C.It’s never too late to learn            D.Great minds think alike
题型:不详难度:| 查看答案

Our plan was to drive into Cambridge, catch the 7:34 train to Liverpool Street Station, then to separate and meet again for lunch.We should have arrived at Liverpool at 9:19, but due to a typical London fog, the train had to move along so slowly that it wasn’t until 10:30 that it got there.In spite of our late arrival, Joan, my wife’s sister, decided that she would go to see the Crown Jewels in the Tower of London while we went shopping.It was only after her sister had disappeared into the fog that my wife realized that we hadn’t decided where we should meet for lunch.Since I had our three tickets for the concert in my pocket, this was indeed a problem.There seemed to be nothing we could do except taking a taxi to the Tower of London, and try to find her there.Needless to say, we didn’t find her.
It was now one o’clock, and the concert began at 2:30.“Perhaps she will think of waiting outside the concert hall,” suggested my wife hopefully.By this time the fog was so thick that road traffic had to stop, and the only way to get there was by underground railway.Hand in hand we felt our way along the road to where we thought the nearest station should be.An hour later we were still trying to find it.Just as I was about to lose my temper completely when we met a blind man tapping his way confidently through the fog.With his help we found Tower Hill tube station just fifty yards down the road.
By now it was far too late even to try to get to the concert hall before the performance began at 2:30, so we decided to return to Cambridge.It took seven long hours instead of the usual two to make that journey.Nor were we able to get any food and drink on the train.Tired and hungry we finally reached home at ten, opening the door to the sound of the telephone bell.It was Joan; she had seen the Crown Jewels, had managed to get another ticket for concert, and had had a wonderful dinner at a restaurant near the hotel where she decided to stay for the night.Now she was ringing to discover whether we had had an equally successful day.
1.Why was Joan separated from her sister and her brother-in-law?
A.they could not see each other because of the fog.
B.Joan had not seen Crown Jewels.
C.They planned to do different things until lunch time.
D.The writer didn’t want to go to the concert.
2.What did the writer plan to do in the afternoon?
A.Go to the concert.                      B.See the Crown Jewels.
C.Return to Cambridge.                    D.Go shopping.
3.The reason why they didn’t all meet for lunch was that _______.
A.They lost their way in the fog
B.they forgot to make necessary arrangement
C.they waited at different places and didn’t meet each other
D.the couple couldn’t find the underground station
4.It’s quite clear that for Joan the trip to London had been ________.
A.spilt by the fog                      B.quite tiring  
C.rather disappointing               D.very enjoyable
题型:不详难度:| 查看答案
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