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[主观题]

Many people who fly at least occasionally have come down with a cold or the flu shortly af

ter disembarking. Is the air in airborne commercial jets (21)？ The Association of Flight Attendants (AFA), (22) which 42,000 flight attendants with 27 airlines are represented, evidently thinks so. The organization claims that the incidence of air-quality-related diseases has (23) among itsmembers and demands that prompt actions be (24) to improve the conditions in the airplane cabin.A study the AFA (25) in 1997 uncovered about l,000 self-reported incidents of headaches,dizziness and memory loss (26)flight attendants and passengers. Some flight attendants were too ill to (27) their safety duties, while others have been permanently disabled.Because of airlines' efforts to (28)their expenses, cabin-air filters are not cleaned (29) .The complaints of flight attendants do not always give (30) to correct maintenance. Airlines turned to recycled air, (31) that they would reduce some of their costs. They are not required to put filters in. Airlines are (32) great pressure to get their flights out (33) .So they do not pay as much attention to systems that are not as (34)to flight schedule and safety.

Recent research findings emphasize the concern that filters can (35) engine chemicals into the cabin air. This may not happen (36) every flight, but it is a persistent problem.

In a study published in October 1998 an investigation was made (37) complaints of crew members (38) air quality and health. More than half of the 200 subjects reported health problems they (39) to cabin air.lt was concluded that these health problems were consistent with (40)harmful gases and substances.

21.

[ A] humid

[ B] unhealthy

[ C] unbearable

[ D] crisp

[D] to

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发布时间：2020-09-26

更多“Many people who fly at least occasionally have come down with a cold or the flu shortly af”相关的问题

第1题

听力原文： No man can change the weather. Nobody can control the weather. But if you study

correctly the signs around us we can tell important changes in weather. This way of telling what the weather will be on the following day or two is called weather forecasts.

For many centuries and in all countries people have studied the weather and tried to make weather forecasting. Sometimes distant objects such as hills and tall trees seem to be very clear and near. This is a sign of much water vapor in the air ,and therefore rain will probably come. Rings round the sun are a sign of coming rain. Many people feel pain in their bones. This is a sign of the coming of wet weather. Some birds fly high if fine weather is coming. They fly near the ground if rain or stormy weather is on the way. It is probably because of the insects which they are hunting that they fly low. If you see a rainbow during rainy weather, this is a sign that the weather will become clear and fine. Such rainbows always come in the evening. If a fog appears in the morning just about sunrise then the day will be warm. If the stars twinkle clearly at night, then fine weather will continue. If the sunset is mostly red in color, then the following day will be fine. If the rainbow appears in the morning, rainy weather will probably come. Most of the above sayings have been made by people who have used their eyes and brains to make weather forecasting.

What kind of weather will it be When distant objects such as hills and tall trees seem to be very clear and near？

A．Sunny day is coming.

B．Rain may come.

C．Fog.

D．Windy day is coming.

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第2题

听力原文： Not only farmers but also scientists have studied weather forecasting. People fo

r many centuries and in all countries have studied the weather and tried to make weather forecast. Sometimes distant objects such as hills and tall trees seem to be very clear and near. This is a sign of much water in the air, and therefore rain will probably, come. When distant sounds, such as noise from a train, birds singing, people shouting, are very clearly heard, then wet and stormy weather is on the way. Some birds, particularly swallows, fly high if fine weather is coming, but they fly very near the ground if rainy weather or a storm is on the way. This is because probably the insects, which they are hunting, then fly low.If you see a rainbow during rainy weather, this is a sign that the weather will clear up and become fine. Such rainbows always come in the evening. If the stars twinkle clearly at night, then fair weather will continue. If a mist appears in the early morning, just about sunrise, then the day will be warm. If the sunset is mostly red in color, then the following day will be fine. When big clouds disappear at sunset, then the weather will follow on the next day. If a rainbow appears in the morning, then rainy weather will probably come. Most of the above sayings have been made up by people who have used their eyes and their brains to forecast the weather.

(33)

A．Because both farmers and scientists try. to make weather forecast.

B．Because people in all countries make weather forecast.

C．Because it is easy to make weather forecast.

D．Because he wants to make it clear how important to make weather forecast.

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第3题

听力原文：Not only farmers but also scientists have studied weather forecasting. People for

听力原文： Not only farmers but also scientists have studied weather forecasting. People for many centuries and in all countries have studied the weather and tried to make weather forecast. Sometimes distant objects such as hills and tall trees seem to be very clear and near. This is a sign of much water in the air, and therefore rain will probably come. When distant sounds, such as noise from a train, birds singing, people shouting, are very clearly heard, then wet and stormy weather is on the way. (30)Some birds, particularly swallows, fly high if fine weather is coming, but they fly very near the ground if rainy weather or a storm is on the way. This is because probably the insects, which they are hunting, then fly low. (31)If you see a rainbow during rainy weather, this is a sign that the weather will clear up and become fine. Such rainbows always come in the evening. If the stars twinkle-clearly at night, then fair weather will continue. If a mist appears in the early morning, just about sunrise, then the day will be warm. If the sunset is mostly red in color, then the following day will be fine. When big clouds disappear at sunset, then the weather will follow on the next day. (32)If a rainbow appears in the morning, then rainy weather will probably come. Most of the above sayings have been made up by people who have used their eyes and their brains to forecast the weather.

(30)

A．Because both farmers and scientists try to make weather forecast.

B．Because people in all countries make weather forecast.

C．Because it is easy to make weather forecast.

D．Because he wants to make it clear how important to make weather forecast.

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第4题

How does the passage portray modern millionaires？ A) People who fly private planes.

How does the passage portray modern millionaires？

A) People who fly private planes. B) People who have the freedom to make any decision.

C) People who do part-time jobs. D) People who lead rotten lives.

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第5题

People who travel a lot fly with Bel Air, because they know they will get what they want.T

People who travel a lot fly with Bel Air, because they know they will get what they want.

They want to go quickly, and safely, across the country, across the sea, or right across the world—and they know Bel Air will take them where they want to go, when they want to go. Air flies all the newest, and fastest aero planes, to more towns and cities, in more countries of the world, than any other airline.

Do you want to go to Paris, Washington, Tokyo？ Bel Air will take you there, at all times of the day or night, right through the week. Bel Air flies not only to the big cities, but we fly two or three times a week to towns and cities in the very heart of Asia, Africa and South America.

People who travel a lot fly with Bel Air, because they know they will leave on time, and arrive on time. They know that the food they will receive, and the films they will watch, will be of the very best.

Bel Air is second to none.

People who fly with Bel Air______.

A．know they will travel a lot

B．get what they want quickly and safely

C．know that everything will be just right

D．always travel right across the world

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第6题

Why is the tsetse fly a problem in Africa？A．People do not like the sound it makes.B．It eat

Why is the tsetse fly a problem in Africa？

A．People do not like the sound it makes.

B．It eats food that people need.

C．It has killed many cattle herds.

D．It can destroy the crop there.

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第7题

CPeople who travel a lot fly with Bel Air, because they know they will get what they want.

C

People who travel a lot fly with Bel Air, because they know they will get what they want.

They want to go quickly, and safely, across the country, across the sea, or right across the world -- and they know Bel Air will take them where they want to go, when they want to go. Bel air flies all the newest, and fastest aeroplanes, to more towns and cities, in more countries of the world, than any other airline.

Do you want to go to Paris, Washington, Tokyo？ Bel Air will take you there, at all times of the day or night, right through the week. But Bel Air flies not only to the big cities, we fly two or three times a week to towns and cities in the very heart of Asia, Africa and South America.

People who travel a lot fly with Bel Air, because they know they will leave on time, and arrive on time. They know that the food they will receive, and the films they will watch, will be of the very best.

Bel Air is second to none.

People who fly with Bel Air______.

[A] know they will travel a lot

[B] get what they want quickly and safely

[C] know that everything will be just right

[D] always travel right across the world

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第8题

Around the World in Eight MegabytesWhen Microsoft put the original Flight Simulator progra

Around the World in Eight Megabytes

When Microsoft put the original Flight Simulator program onto the market, in the early 1980s, I tried it for a while and then gave up. I had thought it would be fun to "take off" from Meigs Field, the airport on the Chicago lakefront where the simulator was programmed to start, and fly between the skyscrapers of the city toward whatever destination I chose. But the on- screen scenery turned out to be sketchy and uninteresting. Worse, I had no idea how to "land" the plane, at Meigs or anywhere else, and the program was not much help in teaching me. After ten or twenty flights that ended mainly with nosedives into the lake or countryside, I decided I could have more fun in other ways.

A dozen years later I became interested in learning to fly (and land) real airplanes, and I thought I should look at simulators again. There were now a range of programs, which were much more effective in teaching flying skills--or at least certain skills. They had also become a form. of entertainment and virtual adventure captivating enough to attract vast numbers of users worldwide. According to Guinness World Records 2001, Microsoft's Flight Simulator had sold a total of 21 million copies by June of 1999.

Simulators' success is certainly deserved. Not many people fly real airplanes; fewer than 650,000 Americans are licensed pilots. But a larger group probably would like to fly. And even people who have almost no interest in flying (surely everybody finds it a little bit exciting to pretend to zoom through the air) or who view computer games as inherently creepy would find it hard to ignore the best modem versions. On a big, high-resolution computer screen you can find yourself facing all amazingly exact rendition of a Learjet cockpit, flying low over the Grand Canyon at dawn, with flashes of lightning visible in the distance, as you listen to air-traffic controllers direct you to the Flagstaff airport. You can take off in a pontoon plane from a lagoon in Bali, fly over paddies on the terraced hillsides, and then head toward java's volcanic craters. You can approach Ayers Rock, in the center of Australia, and watch shadows move across it as the sun goes down. You can indulge in much of the visual romance of flying, without the time, expense, and training required to pilot a real plane.

These riveting effects are the result of an intriguing de facto division of labor. The programs themselves are ail commercial products, from Microsoft and a number of small firms. But a wide variety of add-ons and improvements come from tens of thousands of hobbyists around the world, who spend countless hours polishing or improving some aspect of a program--and then post their work on the Internet for others to share. The flight-sim culture is a delightful reminder of a long-forgotten era, somewhere back in the 1990s, when people were excited about creating software for the new things it would let them do, not simply as a means of gaining market share.

The flight-sim market resembles the rest of the software business mainly in that the most popular offering is from Microsoft. The current version of Microsoft's program is Flight Simulator 2000, or FS2000, which computer discounters offer for about $50. (A "professional" version costs about $70. It includes more simulated airplanes and a larger number of places whose scenery is presented in extra-realistic detail.) With FS2000 and most other programs you can "fly" from practically any point on earth to any other; the differences among the programs lie mostly in the degree of scenic detail, plus certain aspects of the airplanes' look and performance. With all these programs you can also specify the weather conditions through which you'll pass on any particular trip: clouds, wind, turbulence, rain. The fanciest programs let you download the real-time weather for your route, from aviation sites on the

A．Y

B．N

C．NG

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第9题

The conquest of Distance 1 In 1848, pioneers who crossed the American continent in their

The conquest of Distance

1 In 1848, pioneers who crossed the American continent in their wagons made the trip in 109 days. Today a New York family can drive by automobile to San Francisco in less than a week or make the trip several days by train, or fly there in five hours. The transportation has conquered the vastness of the land and trought together people living thousands of kilometers apart.

2 Railroads played a major role in uniting the far reaches of the continent. In 1830 there were only 37km of railroad track in the United States. But by 1863, two companies proposed to connect the east and west coast by a railroad all the way across the continent. Advancing eastward from California, the Central Pacific pushed forward across the desert; the Central Pacific moved slowly westward over the mountain plateaus. Finally, in 1869, the tracks of the two railroads met, and the first transcontinental railroad-the first real link between east and west –was completed.

3 Although the railroads brought towns and cities together, they could not go everywhere. In many parts of America, distances are so great that automobiles are necessities, not luxuries. As we have noted, most American frmers do not live in villages but are sometimes kilometers from their nearest neighbor and even hundreds of kilometers from a town. Large-scale farming is common in many parts of the United States today, but it did not become profitable until there were trucks and tractors. Trucks and cars go wherever there is a road and the more than six million kilometers of roads bring every field and bam into the circle of civilization.

4 The family automotile has helped to bring people of the United States two other things-two things which can seldom exist at the same time:community life and the privilege of privacy. In the early days of industrialization, factory workers lived close together,within walking distance of ther jobs as industries grew,more and more working lass families lived together in crowded conditions. But with the construction of longer and better roads and with the greater availability of automobiles and other means of rapid transportation,it was no longer to live close to the factory. New residential areas, suburbs, trew up outsidethe big cities and increasingly, industry and commerce concentrated in the cities. Every morning, millions of Americans dive their automobiles to work in the city, sometimes a distance of around 100 kilometers. At night they drive home to houses and apartments outside the cities, surrounded by trees and lawns.

5 Automobies and other methods of rapid transportation are also changing American industry. Instead of continuing to concentrate in the bit cities, industry is buiding factories in previously undeveloped areas. Because the means of transportation are available, it is not hard to transport people as well as materials to the places where they are needed. This factor was largely responsible for the

A Automobiles promote farming.

B Planes bring people even closer.

C Railroads unite the whole country.

D Buiding railroads is costly.

E Transportation makes it possible for workers to move out of cities.

F People can travel all over the world.

第23题 paragraph 2

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第10题

In many places people who have________________（有能力解析梦) are likely to be highly respe

In many places people who have________________(有能力解析梦) are likely to be highly respected.

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第11题

Mysterious Nazca Drawings One of the most mysterious archaeological spectacles in the worl

Mysterious Nazca Drawings

One of the most mysterious archaeological spectacles in the world is the immense complex of geometrical symbols, giant ground-drawings of birds and animals, and hundreds of long, ruler-straight lines, some right across mountains, which stretch over 1,200 square miles of the Peruvian tablelands, at Nazca.

Nazca was first revealed to modern eyes in 1926 when three explorers looked down on the desert from a hillside at dusk and briefly saw a Nazca line highlighted by the rays of the sun. But it was not until the Peruvian airforce took aerial photographs in the 1940s that the full magnificence of the panorama was apparent. Hundreds of what looked like landing strips for aircraft were revealed. There were eighteen bird-like drawings, up to 400 feet long, four-sided figures with two lines parallel; and long needle-like triangles which ran for miles. Among the many abstract patterns were a giant spider, a monkey, a shark, all drawn on the ground on a huge scale.

The scale is monumental, but from the ground almost invisible and totally incomprehensible. The amazing fact about Nazca, created more than 1,500 years ago, is that it can only be appreciated if seen from the air. Many, therefore, regarded it as a prehistoric landing ground for visitors from outer space, but Jim Woodman, an American explorer, who was long fascinated by the mystery of Nazea, had a different opinion. He believed that Nazca only made sense if the people who had designed and made these vast drawings on the ground could actually see them, and that led him to the theory that the ancient Peruvians had somehow learned to fly, as only from above could they really see the extent of their handiwork. With this theory in mind, he researched into ancient Peruvian legends about flight and came to the conclusion that the only feasible answer was a hot-air balloon.

To prove his theory, Woodman would have to make such a thing using the same fabrics and fibers that would have been available to the men of Nazca at the time. He started by gathering information from ancient paintings, legends, books and archaeological sites. After many attempts, Woodman built a balloon-type airship. It took him into the air, letting him have the sensation he had never had from viewing the same ground that he had seen many times. His flight was a modern demonstration of an ancient possibility.

One of the “most mysterious archaeological spectacles in the world” is______.

A．the size of Nazca

B．the lines over mountains

C．the Peruvian tablelands

D．the huge and complicated ground-drawings

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