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[主观题]

Our earth has been threatened by all kinds of pollutions.Acid rain is a kind of air pollut

Our earth has been threatened by all kinds of pollutions.

Acid rain is a kind of air pollution which is hanging

over our heads and coming down from many different 【S1】______

ways such as rain and snow. It damages forests, lake and 【S2】______

rivers, buildings and even human health. Several

chemicals, including of sulfur dioxide, nitrogen 【S3】______

oxides and ozone, are involved in causing acid rain.

These chemicals either come directly from power

station chimneys and cars, and are formed from a 【S4】______

combination of pollutant gases. Sulfur dioxide is the

one chemical what is often associated with acid rain. 【S5】______

It is mainly emitted by large coal burning power

stations. It affect places thousands of miles away as 【S6】______

well as areas around the power stations. To prevent

more or worse environmental effects from acid rain, 【S7】______

we have short-term and long-term solutions. We should 【S8】______

just clean up our power station chimneys and car exhausts.

We should also change the way society thinks and reacts.

We need to conserve energy by decreasing efficiency. 【S9】______

We also need to change our way of transport, that is,

create a more efficient transport system which

depends less on private cars and more a good public 【S10】______

transport network. Everybody should work together

to save the world.

【S1】

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更多“Our earth has been threatened by all kinds of pollutions.Acid rain is a kind of air pollut”相关的问题

第1题

The world is not only hungry; it is also thirsty for water. This may seem strange to you
, since nearly 75% of the earth's surface is covered with water. But about 97% of this huge amount is seawater,__ 1_ salt water. Man can only drink and use the other 3% of the fresh water that comes from rivers, lakes, underground, and other _2__.

And we can't even use all of that, because some of it is in the form. of icebergs and glaciers. Even worse, some of it has been polluted.

However, as things stand today, this small amount of fresh water, which is constantly being replaced by rainfall, is still enough for us. But our need_ 3__ water is increasing rapidly – almost day by day. We all have to learn how to stop wasting our previous water. One of the first steps we should _4_ is to develop ways of reusing it.

Experiments have already been done in this__ 5_ but only on a small scale. The systems that have been worked out resemble those used in spacecraft.

A、take

B、or

C、sources

D、for

E、case

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第2题

听力原文:The earth's oceans are colossal, so much bigger than the land area that they cove

听力原文: The earth's oceans are colossal, so much bigger than the land area that they cover 70% of the surface of the earth. They give us food and materials and a major constituent in the formation of our weather. The extremes of temperature on the earth would be much greater, and many places would be too hot or too cold for humans without the oceans to act as the earth's thermostat.

As our supply of fresh water becomes more and more scarce, we have naturally looked to the oceans, the greatest source of water on earth. But there is so much salt in sea water that it is not fit for human consumption. Scientists have been trying to find ways to turn this salt water into fresh water. Machines for the conversion of water are already at work in certain parts of the world, but their cost is still exorbitant. Science will have to find much cheaper ways to do the job.

Possibilities for food abound in the ocean. In addition to the hundreds of varieties of fish, some kinds of seaweed can be eaten. It is nutritious enough, containing many proteins, vitamins, and minerals that humans need for survival, but so far no one has been able to figure out how to disguise its awful taste.

(30)

A.70% of the land surface.

B.Food.

C.Drinking water directly.

D.Mineral water.

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第3题

After living in the 24-hour city of Las Vegas for years, my family and I decided to 1 . I wanted our family to be more 2 . The property they bought was 3 the grid. It was not connected whatsoever to a

ny 4 . We were confronted with real 5 at the time. But the 6 just made us work harder. While living here for the past four months has been a big 7 , there are many 8 to living off the grid. We have learned how to 9 power and water and to really 10 what the earth gives to us every day.

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第4题

Never before()so rapidly developing as it is today.

A、has our country been

B、our country has been

C、has been our country

D、our country hasn’t been

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第5题

听力原文:M: Did you talk with our new manager? He is looking for you these days. I think h
e has something important.

W: I have been out of town for 2 days. And until this morning I come back.

Q: What does the woman mean?

(17)

A.She hasn't talked with the new manager yet.

B.The new manager was not in the office.

C.She has been at home.

D.She didn't want to talk with the new manager.

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第6题

听力原文:The existence of black hole had long been predicted by theory but never confirmed

听力原文: The existence of black hole had long been predicted by theory but never confirmed.

A black hole is an extremely mysterious object. It has a gravity which is so intense that nothing, not even light, can escape from it. It can change space and time in basic ways.

A powerful X-ray stream drew the attention of scientists to the event. It is located near the center of a galaxy which is about 700 million light-years from Earth. According to the international team of scientists, gases from the star have been heated to a temperature of multimillion-degree when they were drawn toward the black hole. Thus a strong wind is produced.

Scientists said a star about the size of our sun was coming close to the black hole. The big gravity of the black hole pulled the star to the point of breaking. It is estimated to have a gravity 100 million times that of our sun.

The effect is similar to the dragging force the moon has on the Earth's oceans, but is much more violent. The black hole has observed to have eaten up about 1 percent of the star. It seems that this unlucky star has just entered the wrong neighborhood.

Scientists have seen other similar X-ray streams before, but never were able to locate them at the center of a galaxy, where black holes may exist. The new observations also found that a black hole is always surrounded by X-rays.

(33)

A.It has an intense gravity.

B.It can change space and time in basic ways.

C.Nothing can escape from it.

D.It has been predicted by theory but never confirmed.

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第7题

Recently some American scientists have given a useful sincere piece of advice to peopl
e in industrialized nations that they would be much healthier if they ate more of the same kind of food eaten by humans living more than 10,000 years ago.

The scientists say that the human body has changed very little since human first appeared on the earth, but the way we live has changed greatly.Our body has not been able to deal with these changes in life style. (方式) and this has led to new kinds of sicknesses.These new sicknesses were not known in ancient times (古代).So they are called “diseases of civilization”.Many cancers and diseases of the blood system (系统),including heart attacks and stroke (中风) are examples of such diseases.

Scientists noted that people in both the Old Stone Age and the New Stone Age enjoyed very little alcohol (酒精) or tobacco (烟草),probably none.Ancient people also got a great deal of physical exercise, but a change in food is one of the main differences between life in ancient times and that of today.

Stone-age people hunted wild animals for their meat, which had much less fat than domestic or tame ones (家畜).They also ate a lot of fresh wild vegetables and fruits.They did not have milk or any other dairy products, and they made very little use of grains.But today, we eat a large amount of these.We eat six times more salt than our remote ancestors.We eat more sugar.We eat twice as much fat but only one third as much protein (蛋白质) and much less vitamin.(维生素) C.

People today probably do not want to live the way people thousands of years ago did, but scientists say that we would be much healthier if we ate much the same way our remote ancestors did ,cutting the amount of fatty, salty and sweet food.

1.According to the passage, people in industrialized nations would be much healthier if they eat()

A.more food as human living 10,000 years ago did

B.as human living 10,000 years ago ate

C.more kinds of food eaten by people living over 10,000 years ago

D.more of the same kind of food eaten by people over 10,000 years ago

2.New kinds of sicknesses have been found because().

A.the human body has changed compared with(同……比较) human first appeared on the earth

B.the way we live has changed a little

C.our body can't deal with the changes in life style

D.the way we live today is proper for the human body

3.What is the main cause that people suffer from a lot of new sicknesses? ()

A.Ancient people did a great deal of physical exercise

B.People today have a lot of alcohol

C.People today have more tobacco

D.Food today is quite different from that of ancient times

4.Which of the following belongs to the dairy product?()

A.Milk

B.Corn

C.Pork

D.Flour

5.According to some scientists, Stone-age people were much healthier than people today because they ate a lot of ______.

A.milk and other dairy products

B.wild animals, fresh.wild vegetables and fruits

C.salt and sugar

D.grain foods

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第8题

Passage OneJune 15, 2005Dear Sir,Your shipment of twelve thousand "Smart" watches was rece

Passage One

June 15, 2005

Dear Sir,

Your shipment of twelve thousand "Smart" watches was received by our company this morning. However, we wish to make a number of complaints concerning the serious delay in delivery and your failure to carry out our instructions with redactors.

Late delivery of the goods has caused us to disappoint several of our most valued customers. The second complaint concerns the mismatch in color between the watches we ordered and those delivered.

As a result of the above problems, therefore, we feel that the most suitable course of action is to return to you unpaid any of the goods considered unsatisfactory. We look forward to your prompt reply.

Yours sincerely,

Marks Swift

Managing Director,

Johnson & Sons Ltd

Passage Two

There are warm tropical regions all over the globe but only the Indians of the South American rain forests have formed the habit of sleeping in the open air. Long before they made painful acquaintance with Europeans, they had invented something that was unique on earth: the hammock.

Nobody really knows who first had the bright idea of making sleeping in the air the symbol of untroubled rest. The Indians see the hammock as a "girl of heaven", something given to them a very long time ago.

In it the Indians pass away hot noon hours, napping or chatting. Swinging it to and fro creates a cooling breath of air and keeps away insects. They work and play in hammocks, are born and die there.

Hung like a suspension bridge between heaven and earth, a hammock is dry while the soil is damp and is safe from most wild animals.

Hammocks have the advantage over beds in that they are easy to transport and take up very little space when they have been rolled up. Indians never go on a journey without their hammocks, not even to their plantations.

Passage Three

As prices and building costs keep rising, the "do-it-yourself' (DIY) trend in the U. S. continues to grow.

"We needed furniture for our living room," says John Ross, "and we just didn't have enough money to buy it. So we decided to try making a few tables and chairs." John got married six months ago, and like many young people these days, they are straggling to make a home at a lime when the cost of living is very high. The Rosses took a 2-week course for $280 at a night school. Now they build all their furniture and make repairs around the house.

Jim Hatfield has three boys and his wife died. He was a full-time job at home as well as in a shoe making factory. Last month, he received a car repair bill for $420. "I was deeply upset about it. Now I've finished a car repair course, I should be able to fix the car b

A.Y

B.N

C.NG

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第9题

Directions: In this part, you will have 15 minutes to go over the passage quickly and answ
er the questions on Answer Sheet 1.

For questions 1-4, mark

Y (for YES) if the statement agrees with the information given in the passage;

N (for NO) if the statement contradicts the information given in the passage;

NG (for NOT GIVEN) if the information is not given in the passage.

For questions 5-10, complete the sentences with the information given in the passage.

Earth's Beginnings: The Origins of Life

Earth is the only planet we know of that can support life. This is an amazing fact considering that it is made out of the same matter as other planets in our solar system, was formed at the same time and through the same processes as every other planet, and gets its energy from the sun.

To a universal traveler, Earth may seem to be a harmless little planet in the far reaches of one of billions of spiral galaxies in the universe. It has an average size star of average brightness and is joined by eight other planets—which support no known life forms—in its solar system.

However, Earth is a planet teeming with vitality and is home to billions of plants and animals that share a common evolutionary track. How and why did we get here? What processes had to take place for this to happen? And where do we go from here? The fact is, no one has been able to come close to knowing exactly what led to the origins of life, and we may never know. After 4.5 billion years of Earth's formation and evolution, the evidence may have been lost. But scientists have made significant progress in understanding what chemical processes that may have led to the origins of life.

There are many theories, but most have the same general perspective of how things came to be the way they are. Following is an account of life's beginnings based on some of the leading research and theories related to the subject, and of course, fossil records dating back as far as 3.5 billion years ago.

Earth's Beginnings

Earth began to form. over 4.5 billion years ago from the same cloud of gas (mostly hydrogen and helium) and interstellar dust that formed our sun, the rest of the solar system and even our galaxy. In fact, Earth is still forming and cooling from the galactic implosion that created the other stars and planetary systems in our galaxy, a process which began about 16 billion years ago as the Milky Way began to form.

As our solar system began to come together some 6—7 billion years ago, the sun formed within a cloud of dust and gas that continued to shrink upon itself by its own gravitational forces. This caused it to undergo the fusion process and give off light, heat and other radiation. During this process, the remaining clouds of gas and dust that surrounded the sun began to form. into smaller lumps called planetesimals, which eventually formed into the planets we know today.

The Earth went through a period of catastrophic and intense formation during its earliest beginnings about 4.5—4.6 billion years ago. By 3.8 to 4.1 billion years ago, Earth had become a planet with an atmosphere (not like our atmosphere today!) and an ocean. This period of time of Earth's formation is referred to as the pre-Cambrian Period. The pre-Cambrian is divided into three parts: the Hadean, Archean and Proterozoic Periods.

Pre-Cambrian Period

The Earth formed under so much heat and pressure that it formed as a molten planet. For nearly the first billion years of its formation—called the Hadean Period (or "hellish" period)—Earth was bombarded continuously by the remnants of the dust and debris—like asteroids, meteors and comets—until it formed into a solid sphere, fell into an orb

A.Y

B.N

C.NG

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第10题

听力原文:M:What do you mean,my suit isn't ready yet! I dropped it off for alteration more
than three weeks ago.

W:Our tailor has been out sick.So work is backed up for about a week.

Q:What is the man's problem?

(14)

A.He felt sick when he saw the alteration.

B.He thinks the woman is being mean.

C.He expected his suit to be ready.

D.He backed up into another car.

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