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There was one thought that air pollution affected only the area immediately around large c

ities with factories and heavy automobile traffic. At present, we realize that although these are the areas with the worst air pollution, the problem is literally worldwide. (76)On several occasions over the past decade, a heavy cloud of air pollution has covered the east of the United States and brought health warnings in rural areas away from any major concentration of manufacturing and automobile traffic. In fact, the very climate of the entire earth may be infected by air pollution. Some scientists consider that the increasing concentration of carbon dioxide in the air resulting from the burning of fossil fuels (coal and oil) is creating a "greenhouse effect"—conserving heat reflected from the earth and raising the world' s average temperature. If this view is correct and the world's temperature is raised only a few degrees, much of the polar ice cap will melt and cities such as New York, Boston, Miami, and New Orleans will be in water.

(77) Another view, less widely held, is that increasing particular matter in the atmosphere is blocking sunlight and lowering the earth' s temperature—a result that would be equally disastrous. A drop of just a few degrees could create something close to a new ice age, and would make agriculture difficult or impossible in many of our top fanning areas. Today we do not know for sure that either of these conditions will happen (though one recent government report drafted by experts in the field concluded that the greenhouse effect is very possible). Perhaps, if we are lucky enough, the two tendencies will offset each other and the world' s temperature will stay about the same as it is now.

As pointed out at the beginning of the passage, people used to think that air pollution ______.

A．caused widespread damage in the countryside

B．affected the entire eastern half of the United States

C．had damaging effect on health

D．existed merely in urban and industries areas

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更多“There was one thought that air…”相关的问题

第1题

Bicycle riders want the city government to set aside special lanes for bicycles on so

me of the main streets, but though they have got some supporters, ()likes the idea.

A、everyone

B、not everyone

C、no one

D、someone

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第2题

Even though the residents of California have always realized that earthquakes are a v

ery real threat, most say going through one is an experience that you can't have imagined until it's actually happened.

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第3题

Differences between peoples______.A．will gradually disappear because of ease of travelB．do

Differences between peoples______.

A．will gradually disappear because of ease of travel

B．do exist even though different nationalities behave exactly alike

C．will always continue to exist and the world will be a bull place

D．will not exist as one hopes

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第4题

Many people who work in London prefer to live outside it, and to go in to their office

s or schools every day by train, car or bus, even though this means they have to get up early in the morning and reach home late in the evening.

One advantage of living outside London is that houses are cheaper.Even a small flat in London without a garden costs quite a lot to rent.With the same money, one can get a little house in the country with a garden of one's own.

Then, in the country one can really get away from the noise and hurry of busy working lives.Even though one has to get up earlier and spend more time in trains or buses, one can sleep better at night and during weekends and on summer evenings, one can enjoy the fresh, clean air of the country.If one likes gardens, one can spend one's free time digging, planting, watering and doing the hundred and one other jobs which are needed in a garden.Then, when the flowers and vegetables come up, one has got the reward together with those who have shared the secret of Nature.

Some people, however, take no interest in country things: for them, happiness lies in the town, with its cinemas and theatres, beautiful shops and busy streets, dance-halls and restaurants.Such people would feel that their life was not worth living if they had to live it outside London.An occasional walk in one of the parks and a fortnight's two weeks) visit to the sea every summer is all the country they want: the rest they are quite prepared to leave to those who are glad to get away from London every night.

1、Which of the following statements is NOT true？_________

A.People who love Nature prefer to live outside the city

B.People who work in London prefer to live in the country

C.Some people enjoying city life prefer to work and live inside London

D.Many nature lovers, though working in London, prefer to live outside the city

2、With the same money ________, one can buy a little house with a garden in the country.

A.getting a small flat with a garden

B.having a small flat with a garden

C.renting a small flat without a garden

D.buying a small flat without a garden

3、When the garden is in blossom, it means that one ________ has been rewarded.

A.living in the country

B.having spent time working in the garden

C.having a garden of his own

D.having been digging, planting and watering

4、People who think happiness lies in the town would feel that _______ if they had to liveoutside London.

A.their life was meaningless

B.their life was invaluable

C.they didn't deserve a happy life

D.they were not worthy of their happy life

5、The underlined phrase get away from in the 3rd paragraph refers to ________.

A.deal with

B.do away with

C.escape from

D.prevent from

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第5题

In the experiment (), students played a computer game that () cash behind three doors

In the experiment （), students played a computer game that （) cash behind three doors

appearing on the screen. The rule was the more money you (), the better player you were, given a total of 100 clicks. Every time the students opened a door by () on it, they would use up one click but wouldn't get any money. However, each () click on that door would earn a () sum of money, with one door always () more money than the others. The important part of the rule was each door switch, though having no cash (), would also use up one of the 100 clicks. Therefore, the winning () was to quickly check all the doors and keep clicking on the one with the seemingly highest ().

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第6题

Observe a child: any one will do. You will see that not a day passes in which he does not

find something or other to make him happy, though he may be in tears the next moment. Then look at a man: any one of us will do. You will notice that weeks and months can pass in which every day is greeted with nothing more than resignation, and endured with polite indifference. Indeed, most men are as miserable as sinners, though they are too bored to sin—perhaps their sin is their indifference. But it is true that they so seldom smile, that when they do we do not recognize their face, so distorted it is from the fixed mask we take for granted. And even then a man can not smile like a child, for a child smiles with his eyes, whereas a man smiles with his lips alone. It is not a smile, but a grin: something to do with humor, but little to do with happiness. And then, as anyone can see, there is a point(but who can define that point？)when a man becomes an old man, and then he will smile again. It would seem that happiness is something to do with simplicity, and that it is the ability to extract pleasure from the simplest things such as a peach stone, for instance.

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第7题

Part ADirections: Read the following four texts. Answer the questions below each text by c

Part A

Directions: Read the following four texts. Answer the questions below each text by choosing A, B, C or D. (40 points)

Placing a human being behind the wheel of an automobile often has the same curious effect as cutting certain fibres in the brain.

The result in either case is more primitive behaviour. Hostile feelings are apt to be expressed in an aggressive way.

The same man who will step aside for a stranger at a doorway will, when behind the wheel, risk an accident trying to beat another motorist through an intersection. The importance of emotional factors in automobile accidents is gaining recognition. Doctors and other scientists have concluded that the highway death toll resembles an epidemic and should be investigated as such.

Dr. Ross A. McFarland, Associate Professor of Industrial Hygiene at the Harvard University School of Public Health, said that accidents “now constitute a greater threat to the safety of large segments of the population than diseases do. ”

Accidents are the leading cause of death between the ages of 1 and 35. About one third of all accidental deaths and one seventh of all accidental injuries are caused by motor vehicles.

Based on the present rate of vehicle registration, unless the accident rate is cut in half, one of every 10 persons in the country will be killed or injured in a traffic accident in the next 15 years.

Research to find the underlying causes of accidents and to develop ways to detect drivers who are apt to cause them is being conducted at universities and medical centres. Here are some of their findings so far:

A man drives as he lives. If he is often in trouble with collection agencies, the courts, and police, chances are he will have repeated automobile accidents. Accident repeaters usually are egocentric, exhibitionistic, resentful of authority, impulsive, and lacking in social responsibility. As group, they can be classified as borderline psychopathic personalities, according to Dr. McFarland.

The suspicion, however, that accident repeaters could be detected in advance by screening out persons with more hostile impulses is false. A study at the University of Colorado showed that there were just as many overly hostile persons among those who had no accidents as among those with repeated accidents.

Psychologists currently are studying Denver high school pupils to test the validity of this concept. They are making psychological evaluations of the pupils to see whether subsequent driving records will bear out their thesis.

The author believes that, behind the wheel of an automobile, some people act

A．as though they were uncivilized.

B．as though they should change their attitudes from hostility to amicability.

C．as though their brain fibres needed cutting.

D．as though they wanted to repress hostile feelings.

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第8题

One day Mrs. Green took several pairs of shoes to a shoemaker to be repaired. After a few

days she picked them up and put them away.

Six months later, she and her husband were asked to dinner. She took a pair of shoes. She hadn't worn them since they were repaired. She put one on her right foot, and then she put the other on her left. She felt something wrong. She took them off for a closer look. They were the same style, color and size, but each was for the right foot. Then she thought of the shoemaker. Though she was sure he wouldn't re member her after such a long time; she called him.

"Thank goodness, you finally called." He said excitedly. "An angry woman has' been troubling me for months."

The shoemaker finished repairing her shoes ______.

A．in a few months

B．in a few days

C．in six months

D．in one day

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第9题

SoBig. F was the more visible of the two recent waves of infection because it propagated i

tself by e-mail, meaning that victims noticed what was going on. SoBig. F was so effective that it caused substantial disruption even to those protected by anti-virus software. That was because so many copies of the virus spread (some 500,000 computers were infected) that many machines were overwhelmed by messages from their own anti-virus software. On top of that, one common counter-measure backfired, increasing traffic still further. Anti-virus software often bounces a warning back to the sender of an infected e-mail, saying that the e-mail in question cannot be delivered because it contains a virus. SoBig. F was able to spoof this system by "harvesting" e-mail addresses from the hard disks of infected computers. Some of these addresses were then sent infected e-mails that had been doctored to look as though they had come from other harvested addresses. The latter were thus sent warnings, even though their machines may not have been infected.

Kevin Haley of Symantec, a firm that makes anti-virus software, thinks that one reason SoBig. F was so much more effective than other viruses that work this way is because it was better at searching hard drives for addresses. Brian King, of CERT, an internet-security centre at Carnegie-Mellon University in Pittsburgh, notes that, unlike its precursors, SoBig. F was capable of "multi-threading", it could send multiple e-mails simultaneously, allowing it to dispatch thousands in minutes.

Blaster worked by creating a "buffer overrun in the remote procedure call". In English, that means it attacked a piece of software used by Microsoft's Windows operating system to allow one computer to control another. It did so by causing that software to use too much memory.

Most worms work by exploiting weaknesses in an operating system, but whoever wrote Blaster had a particularly refined sense of humour, since the website under attack was the one from which users could obtain a program to fix the very weakness in Windows that the worm itself was exploiting.

One Way to deal with a wicked worm like Blaster is to design a fairy godmother worm that goes around repairing vulnerable machines automatically. In the case of Blaster someone seems to have tried exactly that with a program called Welchi. However, according to Mr. Haley, Welchi has caused almost as many problems as Blaster itself, by overwhelming networks with "pings" signals that checked for the presence of other computers.

Though both of these programs fell short of the apparent objectives of their authors, they still caused damage. For instance, they forced the shutdown of a number of computer networks, including the one used by the New York Times newsroom, and the one organising trains operated by CSX, a freight company on America's east coast. Computer scientists expect that it is only a matter of time before a truly devastating virus is unleashed.

SoBig. F damaged computer programs mainly by ______.

A．sending them an overpowering number of messages

B．harvesting the addresses stored in the computers

C．infecting the computers with an invisible virus

D．destroying the anti-virus software of the computers

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第10题

Like most people, I was brought up to look upon life as a process of getting. It was not u

ntil in my late thirties that I made this important discovery: giving away makes life so much more exciting. You need not worry if you lack money. This is how I experimented with giving away. If an idea for improving the window display of a neighborhood store flashes to me, I step in and make the suggestion to the storekeeper. One discovery I made about giving away is that it is almost impossible to give away anything in this world without getting something back, though the return often comes in an unexpected form. One Sunday morning the local post office delivered an important special delivery letter to my home, though it was addressed to me at my office. I wrote the postmaster a note of appreciation. More than a year later I needed a post office box for a new business I was starting. I was told at the window that there were no boxes left, and that my name would have to go on a long waiting list. As I was about to leave, the postmaster appeared in the doorway. He had overheard our conversation. " Wasn't it you that wrote us that letter a year ago about delivering a special delivery to your home？ " I said yes. "Well, you certainly are going to have a box in this post office if we have to make one for you. You don't know what a letter like that means to us. We usually get nothing but complaints.

From the passage, we understand that______.

A．the author did not understand the importance of giving until he was in late thirties

B．the author was like most people who were mostly receivers rather than givers

C．the author received the same education as most people during his childhood

D．the author liked most people as they looked upon life as a process of getting

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