世纪大学英语第一册U.ppt

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1、Unit 9 : Text A,21st Century College English: Book 1,Hothouse Earth,Unit 9: Text A,Lead-in Activities Text Organization Reading Venuss cloud-shrouded atmosphere is about 97 percent carbon dioxide.,Intensive Study,10Although few scientists think the earth will go the way of Venus, most agree that the

2、 greenhouse problem should be tackled now. City planning should be revised; dykes and reservoirs should be built; an eye should be kept open on the thermometer for the first definite sign that the greenhouse era has arrived.,Intensive Study,warn of / against give a warning about,e.g. The message war

3、ned of possible danger. He warned me against going there at night.,Translate 计算机专家让用户们提防黑客的来访。,Key The computer expert warned the users against the visits from hackers.,Key words, phrases cause e.g. The fire resulted in thirty deaths. The talk has resulted in better understandingbetween the two coun

4、tries.,Translate 两国之间的争论最终导致为一场血腥的战争。,Key: The quarrel between the two nations resulted in a bloody war.,Key words, phrases reach a higher level or position; to get up from a lying, sitting, or kneeling position.,Key words, phrases to cause to rise; to bring up for discussion or attention; to breed

5、or bring up.,Key words, phrases come to notice; present itself.,Key words, phrases the softer it falls, the longer it dwells up (驻留) the mind and the deeper it sinks into the mind.,Key 忠告像雪花一样：来得越和缓，留在心里越长久，沁人心睥也越深。,the more the more used to show that the increase in one amount or degree of sth cont

6、inues at the same rate as another,Key words, phrases backwards and forwards, to and for e.g. The kids began to jump up and down excitedly when an elephant came onto the stage. A girl walked up and down the station platform.,Key words, phrases Celsius also Centigrade With freezing-point at 0 and boil

7、ing-point at 100. Fahrenheit to Celsius:(F32)5/9. Celsius to Fahrenheit: C 9/5 +32.,Text-related Information,Scientists warned against treating it as a cry of wolf.,Scientists warned that it would be dangerous to regard the forecast as a false alarm.,Comprehension,with a dip from the mid-1940s to 19

8、70,with a slight drop lasting from the mid-1940s to 1970,Comprehension,the earth will go the way of Venus,the earth will develop into the same situation as that of Venus,Comprehension,Guided Practice,Vocabulary Cloze Translation Structure Writing,Vocabulary,读写教程 I: Ex. V, p. 247,Vocabulary,V.Fill in

9、 the blanks with the words given below. Change the form where necessary.,Vocabulary,1.This article which is based upon careful observation, is sure to attract _ interest from scientists who study the earth.,considerable,2.According to the article, people are fighting to _ the dangers that face the e

10、arth from the “greenhouse effect”., minimize,absorbargueconsiderabledefinitediminish graduallikewisemaintainthreatminimize neverthelessreleaserevisesevereswell tacklevisibletemporaryissueaccount,Vocabulary,3.Engineers have designed some new devices to make the best possible use of the energy _ by th

11、e sun.,released,4.In the article, suggestions were made as to how to _ the greenhouse problem, such as by revising city planning and building dykes and reservoirs., tackle,absorbargueconsiderabledefinitediminish graduallikewisemaintainthreatminimize neverthelessreleaserevisesevereswell tacklevisible

12、temporaryissueaccount,Vocabulary,5.The “greenhouse effect” seems quite obvious while the solution to the problem seems not so _.,definite,6.Mrs. Smith is very concerned about the buildup of carbon dioxide. She and many others who think _ are trying to cut down on their use of cars and other machines

13、 that use fossil fuels., likewise,absorbargueconsiderabledefinitediminish graduallikewisemaintainthreatminimize neverthelessreleaserevisesevereswell tacklevisibletemporaryissueaccount,Vocabulary,7.The more energy the carbon dioxide _, the warmer the atmosphere will become.,absorbs,8.Although a great

14、 amount of carbon dioxide has been released into the atmosphere, it is still not _ to the naked eye., visible,absorbargueconsiderabledefinitediminish graduallikewisemaintainthreatminimize neverthelessreleaserevisesevereswell tacklevisibletemporaryissueaccount,Vocabulary,9.The article _ that the gree

15、nhouse effect is an even greater danger to the world than population growth, diminishing food supply and the like.,argues,10.Scientists warn that in the near future the worlds temperature will further increase while the food supply will further _., diminish,absorbargueconsiderabledefinitediminish gr

16、aduallikewisemaintainthreatminimize neverthelessreleaserevisesevereswell tacklevisibletemporaryissueaccount,Vocabulary,11.Many people may not accept the viewpoints argued in the essay. _, theyre alerted to one of the serious environmental hazards (危险) of our time.,Nevertheless,12.A report on populat

17、ion growth will be _ and questions of birth control will be discussed at the conference., issued,absorbargueconsiderabledefinitediminish graduallikewisemaintainthreatminimize neverthelessreleaserevisesevereswell tacklevisibletemporaryissueaccount,Vocabulary,13.A night in prison is far too _ a punish

18、ment for a boy who only stole a few dollars worth of candy from the shop.,severe,14.The essay _ that anti-intellectualism must be fought and a pro-intellectual culture be cultivated in society., maintains,absorbargueconsiderabledefinitediminish graduallikewisemaintainthreatminimize neverthelessrelea

19、serevisesevereswell tacklevisibletemporaryissueaccount,Vocabulary,15.No one has any idea what could _ for that politicians sudden change of position on the environmental protection law.,account,16.This paper is so disorganized that you will have to _ it a good deal., revise,absorbargueconsiderablede

20、finitediminish graduallikewisemaintainthreatminimize neverthelessreleaserevisesevereswell tacklevisibletemporaryissueaccount,Vocabulary,17.A fad is _ whereas a social trend lasts a long time and becomes a true part of society.,temporary,18.Sometimes a teacher has a great impact on a student all at o

21、nce, but in other cases, a more _ influence takes place., gradual,absorbargueconsiderabledefinitediminish graduallikewisemaintainthreatminimize neverthelessreleaserevisesevereswell tacklevisibletemporaryissueaccount,Vocabulary,19.Anti-intellectualism is, in a sense, a(n) _ to the possibility of cult

22、ural development in any given society.,threat,20.The heavy rain _ the rivers and flooded the district., swelled,absorbargueconsiderabledefinitediminish graduallikewisemaintainthreatminimize neverthelessreleaserevisesevereswell tacklevisibletemporaryissueaccount,Vocabulary,读写教程 I: Ex. VI, p. 249,Voca

23、bulary,VI.Fill in the blanks with the expressions listed below. Change the form where necessary.,Vocabulary,1.According to the report issued recently, the severe climate changes made the _ of the worlds temperatures more difficult to explain.,ups and downs,Vocabulary,2.The article _ the dangerous en

24、vironmental changes which could be caused by the greenhouse effect.,warned of,Vocabulary,3.According to some scientists, carbon dioxide will absorb the energy radiating from the earth instead of letting it _ into space.,pass through,Vocabulary,4.Scientists disagree as to how to _ the gradual warming

25、 of the atmosphere: Some think it is due to natural temperature ups and downs while others are strongly against this theory.,account for,Vocabulary,5.Some people just turn a blind eye to the greenhouse effect, and , _, many just treat it as a cry of wolf.,worst of all,Vocabulary,6.According to the l

26、atest studies, the increase of carbon dioxide levels must have _ the burning of coal, oil, natural gas and the like.,resulted from,Vocabulary,7.The report strongly _ the consequences of not tackling the greenhouse problem right away; it argued that the problem is real and must be controlled.,warned

27、against,Vocabulary,8.One of the most serious effects of the greenhouse problem is that the warming of the atmosphere would _ rivers and bring drought to some fertile areas.,dry up,Vocabulary,9.Some scientists are not concerned about the greenhouse threat that faces the world. _, they can not ignore

28、the fact that the earths temperature has been on the rise for the last several decades.,Even so,Vocabulary,10.Scientific research shows that the average global temperature has been continuously _, though people try to account for this in different ways.,on the rise,Vocabulary,11.Scientists are compa

29、ring the carbon dioxide in the atmosphere to a huge “blanket” which _ the heat energy radiating from the earth.,holds in,Vocabulary,12.The series of lectures on environmental problems will be edited by the publishing house _ of a book to enable us to have an overall picture of the issue.,in the form

30、 of,Vocabulary,13.If the greenhouse problem is _ the rise in carbon dioxide levels, we have to find ways to control the use of fuels which release the harmful gas.,due to,Vocabulary,14.Although the threat of nuclear war might make the greenhouse effect look, _, to be a minor issue, we must still tak

31、e it seriously.,by comparison,Vocabulary,15.The conference concluded that owing to the burning of fossil fuels mankind _ partly _ for the greenhouse effect.,is, to blame,Vocabulary,16.Mother advises us to _ the soup before we have it for our meal.,heat up,Vocabulary,17.Mother asked me to _ on the ba

32、by while she was answering the phone.,keep an eye on,Vocabulary,18.The writer _ himself _ his room to concentrate on writing the article.,shut in,Vocabulary,Cloze,读写教程 I: Ex. X, p. 252,Cloze,X. Fill in each of the blanks with an appropriate word.,1 The greenhouse effect is one of the most important

33、environmental _ facing us today. If the earth continues to heat _, the effects on our climate could be severe. If the polar ice caps _, the level of the seas could rise substantially. If rainfall _ are changed, places that are now fertile breadbaskets could _ up and become deserts. And _ which lie n

34、ear oceans or rivers could be threatened by _.,melt,up,issues,patterns,dry,communities,floods,Cloze,X. Fill in each of the blanks with an appropriate word.,2 Scientists disagree about how profound an effect the build up of carbon dioxide in the _ will have. Some say that the ups and _ of temperature

35、s are due to chance rather _ some irreversible change in our atmosphere. But to more and more scientists, it seems like all the fossil _ which we are burning are having some kind of impact. Temperatures have been increasing _ over the last 90 years and that is difficult fact to explain _.,atmosphere

36、,downs,than,fuels,gradually,away,Cloze,The greenhouse problem is one that should be _ as soon as possible. City planning and water storage should be _ so that we are prepared to handle whatever changes come our way.,tackled,revised,X. Fill in each of the blanks with an appropriate word.,Translation,

37、读写教程 I: Ex. XI, p. 252,XIV. Translate the following sentences into English.,Translation,XIV. Translate the following sentences into English.,1.那位科学家在文章中争辩说，所观察到的现象是暂时的，非典型的，而且这一现象不会持久。,argue that ,The scientist argued in his article that the observed phenomenon is temporary and not typical, and will

38、 not last for long.,last for long,Translation,2.有些人坚持认为尽管温室效应会对全球的天气带来变化，但不会成为对人类的主要威胁。,maintain that,Some people maintain that while the greenhouse effect can bring/create changes to the global weather patterns, it will not become a major threat to mankind.,while,bring /create changes to,Translatio

39、n,mankind,3.这篇文章虽然警告人们温室问题带来的效应是不可逆转的，但它并未提出任何解决问题的建议。,warn against,The article warns against the irreversible effects of the greenhouse problem, but it fails to put forward any suggestions about how to solve the problem.,fail to,Translation,put forward,4.最近发表了许多文章警告核武器扩散的可能性。,have been issued,Recen

40、tly many reports have been issued to warn of the possible spread of nuclear weapons.,warn of,spread of nuclear weapons,Translation,5.这篇文章的结论是世界面临着人口稳步增长而食品供应不断减少的危险。,is steadily rising,The article concludes that the world is facing the danger that while the population is steadily rising, the food su

41、pply is declining.,food supply,is declining,Translation,6.多少年来人们一直在使沙漠变成肥沃的土地，融化高山的冰川来灌溉庄稼。,turn into ,For years people have been trying to turn deserts into fertile lands and to melt mountain glaciers to irrigate crops.,irrigate crops,Translation,7.我们燃烧的燃料愈多，大气层中二氧化碳的含量就愈高。,the more the higher ,The

42、 more fuel we burn, the higher the carbon dioxide levels in the atmosphere will become.,the carbon dioxide levels,Translation,Translation,8. 科学家们一致认为应立即处理温室效应问题。即便如此，对于如何有效控制温室效应一直有相当大的争议。,to be tackled,Scientists agree that the greenhouse problem has to be tackled now. Even so, there has been consi

43、derable debate over how to get it under effective control.,Even so,get sth. under effective control,considerable debate over,读写教程 I: Ex. XIII, p. 254,Structured Writing,Choose one of the four causes given below and write a short passage in which you describe the effect (or effects) that this change

44、would have on your life if it should happen to you. Use the modal verbs, might, could, and should to express the ideas of possibility, likelihood, and advisability. Use would to express what you feel you would actually do.,Structured Writing,Two of your roommates got into fight and refused to talk t

45、o each other anymore.,2.One of your parents became seriously ill.,3.You failed in a recent exam.,4.You won a ten-thousand yuan prize.,Structured Writing,Sample Essay for Topic 1,If Two of My Roommates Got into a Fight, ,Structured Writing,If two of my roommates got into a serious fight and refused t

46、o talk to each other any more, it would certainly be a problem for me too. I would have a few choices about how to deal with it. I could completely ignore the fight and wait for the problem to just go away, but this wouldnt be realistic. I could talk to both of them at once and try to solve their pr

47、oblems for them. If I did this, however, they would probably both get angry at me. I think what I would actually do would be to talk to each of them individually. Depending on what they said, I might give them advice about what to do, or I might just listen silently. If I thought one or both of them

48、 was not being responsible or reasonable, I would try to point it out to them in a calm way. In any case, I would do anything in my power to help them to end the fight. When you are sharing a room, any problem between some of the people becomes a problem for all of the people.,Structured Writing,Ple

49、ase exchange your writing with the classmate sitting beside you and revise his writing, such as correcting spelling mistakes, eliminating redundancy, and considering sentence types.,Lets do it!,Structured Writing,Assignment,1.Revision of Text A: StructureEx. VIII & IXp.251 ClozeEx. Xp.252 TranslationEx. XIp.253 2.Preview of Text B: Guessing Unknown Words and Expression p. 261,