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听力原文：Some fuel or oil additives can be a problem for engines and fuel systems. Additiv

es displace protective chemicals in gasoline and engine oil; some may corrode fuel pumps or gas tanks, or make flexible fuel hoses and fittings brittle. Instead of enhancing engine life and economy, users might shorten their car's life.

Users might shorten their car's life by using some fuel or oil additives which cause engines and fuel systems such problems as displacement of protective chemicals in gasoline and engine oil and corrosion of fuel pumps or gas tanks.

A．正确

B．错误

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发布时间：2021-12-16

更多“听力原文：Some fuel or oil additives can be a problem for engines and fuel systems. Additiv”相关的问题

第1题

听力原文：This press conference was called to clarify some talk that has been going around.

Ocean Blue Air and Sky High Airlines are in talks to discuss an alliance, not a merger as some newspapers and stations have reported. Although our board members are meeting this week, we're not expecting to have any decisions made anytime soon. We just want to see what options we have. With fuel prices breaking records and lower profit expectations, Ocean Blue Air must do its best to stay on top, which means examining what options are available. Now, I will be happy to answer a few questions.

Who most likely is the audience？

A．Employees

B．Company investors

C．A group of reporters

D．Executive board members

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第2题

听力原文：To extinguish different kinds of fires, several types of fire extinguishers have

听力原文： To extinguish different kinds of fires, several types of fire extinguishers have been invented. They must be ready for immediate use when fire breaks out. Most portable kinds operate for less than a minute, so they are useful only on small fires. The law requires ships, trains, buses and planes to carry extinguishers.

Since fuel, oxygen and heat must be present in order for fire to exist, one or more of these things must be removed or reduced to extinguish a fire. If the heat is reduced by cooling the material below a certain temperature, the fire goes out. The cooling method is the most common way to put out a fire. Water is the best cooling material because it is low in cost and easy to get.

Another method of extinguishing fire is by cutting off the oxygen. This is usually done by covering the fire with sand, steam or some other things. A blanket may be used to cover a small fire.

A third method is called separation, which includes removing the fuel, or material easy to burn, from a fire, so that it can find no fuel.

The method that is used to put out a fire depends upon the type of fire. Fires have been grouped in three classes. Fires in wood, paper, cloth and the like are called Class A fires. These materials usually help keep the fire on. Such fires can be stopped most readily by cooling with water.

(30)

A．Separating the fire.

B．Reducing the heat.

C．Removing the fuel

D．Cutting off the oxygen.

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第3题

听力原文：M: Hi Diana, mind if I sit down？W: Not at all, Jack. How have you been？M: Good. B

听力原文：M: Hi Diana, mind if I sit down？

W: Not at all, Jack. How have you been？

M: Good. But I'm surprised to see you on the city bus. Your car in the shop？

W: No. I've just been thinking a lot about the environment lately. So I decided the air will be a lot cleaner if we all use public transportation when we could.

M: I'm sure you are right. The diesel bus isn't exactly pollution free.

W: True. But they'll be running a lot cleaner soon. We were just talking about that in my environmental engineering class.

M: What's the city gonna do？ Install pollution filters of some sort on their buses？

W: They could, but those filters make the engines work harder and really cut down on fuel efficiency. In stead they found a way to make their engines more efficient.

M: How？

W: Well, there is a material called coniine oxide. It's a really good insulator. And a thick coat of it get sprayed on certain part of the engine.

M: An insulator？

W: Well, yeah. Actually, what it does is reflect back the heat of burning fuel. So the fuel will burn much hotter and burn up more completely.

M: So a lot less unburned fuel comes out to pollute the air, right？

W: Yeah, and the bus will need less fuel. So with the savings on fuel oil costs, they say this will all pay for itself in just six months.

M: Sounds like people should all go out and get some of this stuff to spray on their car engines.

W: Well, it's not really that easy. You see, normally, the materials are fine powder. To melt it so you can spray a coat of it on the engine parts, you first have to heat it over 10,000 degrees and then, well, you get the idea. It's not something you or I would be a ble to do ourselves.

(23)

A．A new fuel for buses.

B．The causes of air pollution.

C．Careers in environmental engineering.

D．A way to improve fuel efficiency in buses.

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第4题

听力原文：（A)The man is replacing the wheel.（B)The man is putting fuel in the car.（C)The ma

听力原文：(A) The man is replacing the wheel.

(B) The man is putting fuel in the car.

(D) The man is wiping the wheel.

听力原文：（A)The man is replacing the wheel.（B)The man

A．

B．

C．

D．

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第5题

听力原文：When you turn on the radio, you hear an advertisement. When you watch television,

听力原文： When you turn on the radio, you hear an advertisement. When you watch television, you hear and see an advertisement. If you turn the pages of a newspaper or magazine, again you find an advertisement. If you walk down the street, you see one advertising board after another. All day, every day, people who want to sell you something competent to catch your attention. As a result, advertisements are almost everywhere. In the West, advertisements are the fuel that makes mass media work. The government does not give money to mass media such as TV stations, newspapers, magazines and radio stations. They are all owned privately. So where does the money come from？ From advertisements. Without advertisements, there would not be these private businesses.

Have you ever asked yourself what advertising is？ Through the years, people have given different answers to the question. For some time it was felt that advertising was a means of "keeping your name before the public." And some people thought that advertising was "truth well told." Now more and more people describe it in this way: Advertising is the paid, nonpersonal, and usually persuasive description of goods, services and ideas through various media.

All advertisements try to make people believe that the product, idea, or service advertised can do well to them. Advertisements exist everywhere in our lives.

(30)

A．The importance of advertisement.

B．The society's great need of advertisement.

C．The origin of advertisement.

D．The prosperity of advertisement.

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第6题

听力原文：Should a person own a car？ This is an important question. In a large urban area,

听力原文： Should a person own a car？ This is an important question. In a large urban area, there are some good reasons for owning a car. Firstly, a car allows a person to move around freely. With a car there is no need to check a bus schedule or wait for a train. Secondly, a car is a comfortable way to travel, especially in the winter time. In bad weather, the driver stays warm and dry, while the poor bus or train rider might have to stand in the rain. Finally, a driver is usually safe in a car at night. The bus rider might need to walk down a dark street to get to a stop, or wait on a dark corner.

There are, on the other hand, many good reasons against owning a car. Firstly, it can be very expensive. The price of fuel continues to rise each year. In addition, it is expensive to maintain and repair a car. A simple repair can cost $ 50. In an urban area, it might also be expensive to park a car. Secondly, owning a car can cause worry and stress. It is exhausting to drive in heavy traffic. If you leave your car on the street, it might get stolen. That is something else to worry about.

(33)

A．Buses and trains are too crowded.

B．A person can move around freely.

C．It is easy to maintain cars.

D．A driver is usually safe in his car.

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第7题

听力原文：An environmental group called the Food Commission is unhappy and disappointed bec

听力原文： An environmental group called the Food Commission is unhappy and disappointed because of the sale of bottled water from Japan. The water, angrily argued in public, has traveled 10,000 "food miles" before it reaches Western customers. "Transporting water halfway across the world is surely the extremely stupid use of fuel when there is plenty of water in the UK." It is also worried that we are wasting our fuel by buying prams from Indonesia (7,000 food miles) and carrots from South Africa (5,900 food miles). Counting the number of miles traveled by a product is a strange way of trying to tell the true situation of the environmental damage done by an industry. Most food is transported around the world on container ships that are extremely energy efficient. It should be noted that a ton of butter transported 25 miles in a truck to a farmers' market does not necessarily use less fuel on its journey than a similar product transported hundreds of miles by sea. Besides, the idea of "miles" ignores the amount of fuel used in the production. It is possible to cut down your food miles by buying tomatoes grown in Britain rather than those grown in Ghana; the difference is that the British ones will have been raised in heated greenhouses and the Ghanaian ones in the open sun.

What the idea of "food miles" does provide, however, is the chance to cut out Third World Countries from First World food markets. The number of miles traveled by our food should, as I see it, be regarded as a sign of the success of the global trade system, not a sign of damage to the environment.

Questions 26 to 29 are based on the passage you have just heard.

26. Why is the Food Commission angry？

27. What does the phrase "food miles" mean according to the passage？

28. What does the speaker try to explain by comparing tomatoes raised in Britain and in Ghana？

29. Who is most probably giving this talk？

(33)

A．It finds some imported goods cause environmental damage.

B．UK wastes a lot of money importing food products.

C．It thinks people waste energy buying food from other countries.

D．Growing certain vegetables causes environmental damage.

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第8题