交通大学远程教育——大学英语课后练习题及答案.doc
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1、Unit 1Part Two: Read and PracticeRead and ThinkII. Answer the following questions according to the text.1.What are the main type of air Pollution?An.: These include smog, acid rain, the greenhouse effect, and holes in the ozone layer.2.Where does exhaust come from?An.: The exhaust comes from burning
2、 fuels in automobiles, homes, and industries.3.Why is the amount of carbon dioxide in the air continuing to increase?An.: Carbon dioxide is produced when fuels are burned. Plants convert carbon dioxide back to oxygen, but the release of carbon dioxide from human activities is higher than the worlds
3、plants can process. The situation is made worse since many of the earths forests are being removed, and plant life is being damaged by acid rain.4.Can pollutants be created by indoor activities? An.: Yes. Some pollutants can be created by indoor activities such as smoking and cooking.5.What is the f
4、irst step to solve air pollution?An.: The first step to solve air pollution is assessment.III. Put in the missing words according to the text. There are several main types of pollution and well-known effects of pollution. One type of air pollution is the release of particles into the air from burnin
5、g fuel for energy. Another type of pollution is the release of harmful gases in the atmosphere, forming smog and acid rain. The greenhouse effect is also referred to as global warming. In many countries in the world, steps are being taken to stop the damage to our environment from air pollution. The
6、y have set controls on pollution emissions for transportation vehicles and industry and we must meet the challenge in order to assure that a healthy environment will exist for ourselves and our children.Read and CompleteIV. Spell the following words with the help of their meanings and first letters.
7、1. e ssential a. absolutely necessary. Vitally necessary2. s ubstancen. that which has mass and occupies space3. s ignificanta. important; of consequence; having or expressing a meaning4. w ell-beingn. a contented state or being happy healthy and prosperous5. exhaustn. gases ejected from an engine a
8、s waste products6. convertv. to change the nature, purpose, or function of something7. reactionn. a process in which one or more substances are changed into others8. derivev. to obtain; to come from9. consequencen. the outcome of an event especially as relative to an individual10. exposuren. the sta
9、te of being put into a situation in which something harmful or dangerous might affect youV. Complete each of the following statements with the words you have learned in the text.1. He explained that his delay was due to an accident.2. For every action there is an equal and opposite reaction.3. This
10、is one of the most significant studies of the subject.4. This garden has the best collection of native plants. In addition , it contains numerous trees and flowers from overseas.5.The paint came off as the result of exposure to the rain.VI. Fill in the blanks with the proper words and expressions gi
11、ven below, changing the form if necessary.1.We refer to copper and silver as good conductors.2.Here patience is essential.3.The company supply, the children in the mountain area with a lot of books.4.These phenomena are very common now.5.These English words derive from Greek.6.The storm caused untol
12、d damage to the farmers production.7.The region continues to suffer from serious pollution.8.How do you convert iron into steel?9.Climate change could have serious consequences for Africa.10.The harmful substances released into the environment.VII. Word building.Now add -en to each of the words belo
13、w and then complete each of the following sentences with one of the finished words.Sharp-sharpen; deep-deepen; high-heighten; bright-brighten; short-shorten; broad- broaden; wide-widen; quick-quicken; dark-darken; long-lengthen.1. John glanced at his watch and quickened his pace.2. The road broadene
14、d into an imposing avenue last year.3. His expression brightened when I mentioned the money.4. The gap between income and expenditure has widened to 10%.5. They are talking about shortening the working week.6. The bad news darkened their view of the situation.7. Its an opportunity for young people t
15、o deepen their understanding of the world.8. The teacher advises pupils to sharpen all their pencils before the test.9. The director uses music to heighten tension in the scene.10.The days lengthened as summer approached.VIII. Pay attention to the italicized parts in the English sentences and transl
16、ate the Chinese sentences.1. 示例:Air supplies us with oxygen which is essential for our bodies to live. Trees and flowers can supply us with fresh air and beautiful view.这家公司的任务是向周围的住户供应煤气。译:The task of this company is to supply the homes around with gas.他们向受洪灾地区(the flood-stricken area)的人们提供了食品援助(ai
17、ds)。译:They supplied the people in the flood-stricken area with food aids.2. 示例:This type of pollution is sometimes referred to as “black carbon” pollution. He is referred to as a living Shakespeare.他们称他是一位政治家。译:They referred to him as a politician.那些在办公室工作的人被称为“白领(white collar)工人”。译:People who work
18、in offices are usually refer to as “white collar workers”.3. 示例:These can take part in further chemical reactions once they are in the atmosphere, forming smog and acid rain.Once you start, you will never give up.钱一旦花光了,我们就回不了家了。译:Once the money has gone, we cannot go back home.一旦出版,这本词典将会非常畅销!译:Onc
19、e printed, this dictionary will be very popular!4. 示例:Only through the efforts of scientists, business leaders, legislators, and individuals can we reduce the amount of air pollution on the planet.Only in a big city was it possible to buy a new wheelchair.孩子们只有在长大了之后,才能明白父母的辛苦。译:Only after the child
20、ren grew up could they understand their parents hard working.我们只有在山顶上才能看到整座城市的美景。译:Only at the top of the mountain can we see the beautiful scenes of the whole city.5.示例:This challenge must be met by all of us in order to assure that a healthy environment will exist for ourselves and our children. N
21、othing can assure permanent happiness.他向我保证他已经完成了。译:He assured me that he had finished.我可以向你保证这消息是可靠的。译:I can assure you of the reliability of the news.IX. Translate the following sentences into English.1我们为顾客提供各种优质商品。译:We supply our customers with a variety of goods with high quality. 2应该采取适当的措施保护当
22、地的环境和历史。译:Proper steps should be taken to protect local environment and history. 3只有用这种方式,你才能从你的错误中吸取教训。译:Only in this way can you learn form your mistakes.4在大城市,空气污染是个大问题,尤其是在发展中国家。译:Air pollution is a big problem in large cities, especially in developing countries.5此外,为了解决污染问题,我们应该限制私人轿车的数量而增加公共汽车
23、的数量。译:In addition, in order to solve the pollution problem, we should limit the number of private cars while increase the number of public buses.X. Translate the following sentences into Chinese.1.Each of these problems has serious effects on our health and well-being as well as on the whole environ
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