交通大学远程教育――大学英语课后练习题及答案
Unit 1
Part Two: Read and Practice Read and Think II. Answer the following questions according to the text. 1.What are the main type of air Pollution?
An.: The include smog, acid rain, the greenhou effect, and \2.Where does exhaust come from?
An.: The exhaust comes from burning fuels in automobiles, homes, and industries. 3.Why is the amount of carbon dioxide in the air continuing to increa?
yilan
An.: Carbon dioxide is produced when fuels are burned. Plants convert carbon dioxide back to oxygen, but the relea of carbon dioxide from human activities is higher than the world's plants can process. The situation is made wor since many of the earth's 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 first step to solve air pollution?
An.: The first step to solve air pollution is asssment. III. Put in the missing words according to the text.
There are veral main types of pollution and well-known effects of pollution. One type of air pollution is the relea of particles into the air from burning fuel for energy. Another type of pollution is the relea of harmful gas in the atmosphere, forming smog and acid rain. The greenhou 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. They have t 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 ourlves and our children. Read and Complete IV. Spell the following words with the help of their meanings and first letters. 1. e sntial a. absolutely necessary. Vit
ally necessary 2. s ubstance n. that which has mass and occupies space 3. s ignificant a. important; of conquence; having or expressing a meaning 4. w ell-being n. a contented state or being happy healthy and prosperous 5. exhaust n. gas ejected from an engine as waste products 6. convert v. to change the nature, purpo, or function of something 7. reaction n. a process in which one or more substances are changed into others 8. derive v. to obtain; to come from
9. conquence n. the outcome of an event especially as relative to an individual 10. exposure n. the state of being put into a situation in which something harmful or dangerous might affect you
V. 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 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 overas.
5.The paint came off as the result of exposure to the rain. VI. Fill in the blanks with the proper words and expressions given below, changing the form if necessary.
2015高考理综
1.We refer to copper and silver as good conductors. 2.Here patience is esntial. 3.The company supply, the children in the mountain area with a lot of books. 4.The phenomena are very common now. 5.The English words derive from Greek. 6.The storm caud untold damage to the farmer’s production. 7.The region continues to suffer from rious pollution. 8.How do you convert iron into steel? 9.Climate change could have rious conquences for Africa. 10.The harmful substances relead into the environment. VII. Word building.
英语教育格言overwhelming Now add -en to each of the words below and then complete each of the following ntences 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 broadened 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. It’s an opportunity for young people to deepen their understanding of the world. 8. The teacher advis pupils to sharpen all their pencils before the test. 9. The director us music to heighten tension in the scene. 10.The days lengthened as summer approached. VIII. Pay attention to the italicized parts in the English ntences and translate the Chine ntences.
妈妈英文 1. 示例：Air supplies us with oxygen which is esntial 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。感统训练哪家好
anything>长沙英语家教
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(aids)。 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 in offices are usually refer to as “white collar workers”.
wison 3. 示例：The 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.
heighten
