Electricity plays an essential part in our life. No one can deny that electric light is ne - 试题答案网问答

第1题

Section II Use of English（15 minutes)Read the following text. Choose the best word（s) for

Section II Use of English

(15 minutes)

Read the following text. Choose the best word(s) for each numbered blank and mark [A] ,[B] , [C] or [D] on ANSWER SHEET1

Electricity plays an essential part in our life. No one can deny that electric light is necessary for people's life. However, can you imagine such a world where there is n0 (21) 0f electric light？ As darkness falls over, children read in the light given by oil lamps and candles. Youths (22) time only by talking instead of watching TV. Everything is surrounded by (23) shadows. (24) , we have a man named Edison. He created bulb that (25) for two days before burning out. He also developed successfully a system for (26) electricity from a central power house. It is he that gives us electric light, gramophone, moving pictures-all those we take (27) granted.

After the invention of electricity, manufacturers increasingly applied the findings of invention to their businesses, (28) generating new industrial growth. Development of electricity leads to the (29)creations of new products and materials. In the past century and a half, electricity has steadily (30) . At frist, it is scientific curiosity, then to a luxurious part of the (31), and then to being necessary in every one's life. Electricity has been common in the latest fifty years. Simple tasks, such as setting alarm clock to wake up at a (32) time or enjoying a piece of music, are accomplished via electronic means.

We live with the benefits of electricity every day. As a result, we always think that whenever we (33) 0ur gadgets into the wall socket, the power will be there. For most modern people, the loss of power means the complete loss of(34 ) Their lifestyle. is so dependent upon the grid's constancy (35) they do not know how to live without it. How do you cook a meal without electricity if your gas stove has an electric ignition？ Please imagine the life without electricity further. What do you do with a freezer full of food in a hot day？ How do you find out what is happen/ng in your area with the TV and radio off？ These are questions which should be seriously considered. Let us imagine the (36) 0f a short power outage together. Factories close down; phones and comput-ers go dead; food . (37) in refrigerators. What a disordered life that would be!

All the convenience which electricity has brought to our life should owe to Edison. When Edi-son died at his home in New Jersey in 1931, the whole United States were switched off to mark his passing, and in (38) 0f the man whose discoveries had so changed and improved the life of peo-ple everywhere. For a moment, all was (39) as the world had always been before, until Edi-

son (40) 0n the light.

21.

[A] power

[B] strength

[C] force

[D] vigor

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第2题

听力原文：When friends come to visit us in the evening, they spend their time telling us th

听力原文： When friends come to visit us in the evening, they spend their time telling us that they are in a hurry and looking at their watches. It isn't that our friends are all busy, it is just that we haven't got a television. People think that we are very strange. "But what do you do in the evenings？" they are always asking. The answer is simple. Both my wife and I have hobbies. We certainly don't spend our evenings staring at the walls. My wife enjoys cooking and painting and often attends evening classes in foreign language. This is particularly useful as we always go abroad for our holidays. I collect stamps and am always busy with my collection. Both of us enjoy listening to music and playing chess(象棋)together.

Sometimes there are power cuts and we have no electricity in the house. This does not worry us as we just light candles and carry on with what we were doing before. Our friends are lost--no television! --so they don't know what to do. On such evenings our house is very full as they all come to us. They all have a good time. Instead of sitting in silence in front of the television, everybody talks and plays games. Yes, life is possible without television!

(33)

A．Because they are in a hurry.

B．Because they are strange.

C．Because they cannot watch TV.

D．Because they have other schedules.

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第3题

Automobiles VS Public TransportPublic transport plays a central role in any efficient urba

Automobiles VS Public Transport

Public transport plays a central role in any efficient urban transport system in developing countries, where at least 16 cities are expected to have more than 12 million people each by the end of this decade, failing to give priority to public transport would be disastrous.

The term "public transport" covers many different types of vehicles, but most commonly refers to buses and trains. Rail services fall into four major categories: rapid rail (also called the underground, tube, metro, or subway), which operates on exclusive rights-of-way (优先行驶权) in tunnels or on elevated tracks; trams, which move with other traffic on regular streets; light rail, which is a quieter, more modern version of trams that can run either on exclusive rights-of-way or with other traffic: and suburban or regional trains, which connect a city with surrounding areas.

The recent trend in many cities is toward light rail over "heavy" rapid-rail systems. Whereas metros require exclusive rights-of-way, which often means building costly elevated or underground lines and stations, light rail can be built on regular city streets.

The concept of public transport also includes organized car pools, in which several people share the cost of riding together in the same private automobile. For US commuters in areas with inadequate bus and train services, this is the only "public" transport option. But even where other systems are comprehensive, there is vast potential for car pooling; recent research shows that in cities the world over, private cars during commuting hours on average carry just 1.2 1.3 persons per vehicle.

Public transport modes vary in fuel use and emissions and in the space they require, but if carrying reasonable numbers of passengers, they all perform. better than single-occupant private cars on each of these counts.

Although energy requirements vary according to the size and design of the vehicle and how many people are on board, buses and trains require far less fuel per passenger for each kilometer of travel. In the United States, for example, a light-rail vehicle needs an estimated 640 BTUs (British Thermal Units, measure of energy consumed) of energy per passenger per kilometer; a city bus would use some 690 BTUs per passenger-kilometer; and a car pool with four occupants 1,140 BTUs. A single-occupant automobile, by contrast, consumes nearly 4,580 BTUs per passenger-kilometer.

The pollution savings from public transport are even more dramatic. Since both rapid and light rail have electric engines, pollution is measured not from the motor exhaust, but from the power plant generating electricity, which is usually located outside the city, where air quality problems are less serious. For typical U.S. commuter routes, rapid rail emits 30 grams of nitrogen oxides for every 100 kilometers each rail passenger travels, compared with 43 grams for light rail, 95 grams for transit buses, and 128 grams for single-occupant automobiles. Public transport's potential for reducing hydrocarbon (碳氢化合物)and carbon monoxide(一氧化碳)emissions is even greater.

Although diesel buses—especially in developing countries—can be heavy polluters, existing technologies, such as filters, can control their exhaust. Buses can also run on less polluting fuels such as propane (丙烷, used in parts of Europe) and natural gas (used in Brazil and China). Test buses in the Netherlands that run on natural gas are estimated to emit 90 percent less nitrogen oxide and 25 percent less carbon monoxide than diesel engines do.

In addition to reducing fuel consumption and pollution, public transport saves valuable city space. Buses and trains carry more people in each vehicle and, if they operate on their own rights-of-way, can safely run at much higher speeds. In other words, they not only take up less space but also occupy it for

A．Y

B．N

C．NG

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第4题

In 1997, people will ______.A．not use any electricityB．use more electricity than they do t

In 1997, people will ______.

A．not use any electricity

B．use more electricity than they do today

C．use less electricity than they do today

D．not like electricity any more

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第5题

In 1997 ,people will ______.A．not use any electricityB．use more electricity than they do t

In 1997 ,people will ______.

A．not use any electricity

B．use more electricity than they do today

C．use less electricity than they do today

D．not like electricity any more

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第6题

How many volts of electricity can an electric eel emit？A．1,000.B．800.C．200.D．120.

How many volts of electricity can an electric eel emit？

A．1,000.

B．800.

C．200.

D．120.

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第7题

An optical computer is a computer that uses electricity i. e. electrons, to manipulate, store and tr

ansmit data.

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第8题

Even if you have electricity and water, you still cannot produce hydrogen everywhere.A．YB．

Even if you have electricity and water, you still cannot produce hydrogen everywhere.

A．Y

B．N

C．NG

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第9题

9．An optical computer is a computer that uses electricity i. e. electrons, to manipulate, store and

transmit data.

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第10题

A．Advantages of nuclear-generated electricity.B．Nuclear-and-coal-generated electricity

A．Advantages of nuclear-generated electricity.

B．Nuclear-and-coal-generated electricity.

C．Nuclear-generated electricity becoming one of the basic props supporting the U.S. economy.

D．U.S. energy independence.

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