题目内容

18.There was one thought that air pollution affected only the area immediately around large cities with factories and heavy traffic.At present.we realize that although these are the areas with the worst air.pollution.the problem is really worldwide.On several occasions over the past decade,a heavy cloud of air pollution has covered the east of the United States and brought health warnings in distant areas away from any industrial cities.In fact,the very climate of the entire earth may be infected by air pollution.Some scientists consider that the increasing concentration of carbon dioxide in the air resulting from the burning of fossil fuels(coal and oil)is creating a"greenhouse effect"一keeping heat reflected from the earth and raising the world's average temperature.If this view is correct and the world's temperature is raised only a few degrees.much of the polar ice cap will melt and.cities such as New York,Boston,Miami,and New Orleans will be in water.
Another view.1ess widely held.is that increasing particular matter in the atmosphere is blocking sunlight and lowering the earth's temperature-a result that would be equally disastrous.A drop of just a few degrees could create something close to a new ice age,and would make agriculture difficult or impossible in many of our top farming areas.Today we do not know for sure that either of these conditions will happen.Perhaps,if we are lucky enough,the two tendencies will offset each other and the world's temperature will stay about the same as it is now.Driven by economic profits.people ignore the damage on our environment caused by the"advanced civilization".Maybe the air pollution is the price the human beings have to pay for their development.But is it really worth-while?

66.People used to think that air pollutionD.
A.caused widespread damage in the countryside
B.affected the entire eastern half of the United States
C.had a very bad effect on health
D.existed merely in urban and industrial areas
67.As to the greenhouse effect.the authorB.
A.shares the same view,with the scientists.
B.is uncertain of its occurrence
C.rejects it as being ungrounded
D.thinks that it will destroy the world soon
68.The underlined word"offset"in the second paragraph could be replaced byA.
A.counter-act    B.break from     C.get along    D.communicate
69.If the world's temperature lowered just a few degreesB.
A.it would not do much harm to life on earth
B.it would lead major farming areas to disaster
C.particular things would increase greatly in the atmosphere
D.seas and oceans would flood many cities
70.This passage is primarily aboutC.
A.the greenhouse effect                
B.the burning of fossil fuels
C.the potential effect of air pollution       
D.the possibility of a new ice age.

分析 本文说明了这篇短文主要讲了空气污染的潜在影响.并且提出了这样一个问题:人类文明的进步要以空气被污染为代价,这是否值得?

解答 66.D.细节理解题.根据第一段There was one thought that air pollution affected only the area immediately around large cities with factories and heavy traffic可知人们过去认为空气污染仅仅在城市和工业区,故选D.
67.B.推理判断题.根据第二段Today we do not know for sure that either of these conditions will happen.以及全文内容可知作者对温室效应的发生时不确定的;故选B.
68.A.词义猜测题.根据第二段and the world's temperature will stay about the same as it is now.可知offset意思是抵消,故选A.
69.B.细节理解题.根据第二段"A drop of just a few degrees could create something close to a new ice age,and would make agriculture difficult or impossible in many of our top farming areas"可知如果世界气温降低几度这将导致主要农业地区的灾难;故选B.
70.C.主旨大意题.结合全文内容,可知这篇短文主要讲了空气污染的潜在影响,故选C.

点评 考察学生的细节理解和推理判断能力,做细节理解题时一定要找到文章中的原句,和题干进行比较,再做出正确的选择.在做推理判断题不要以个人的主观想象代替文章的事实,要根据文章事实进行合乎逻辑的推理判断.

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Despite their popular appeal,hippos,as well as other animals,have difficulty when their needs conflict with those of humans.The early Egyptians liked to hunt hippos for their teeth and because they were dangerous animals.Amulets(护身符)to protect babies from demons(恶魔)were made from hippo bones.
About 4,000years ago,there were so many hippos in Egypt that they caused serious crop damage.Egyptian farmers killed them routinely,and by the beginning of the 19th century,all the hippos in Africa had been killed.
People used to see hippos fight in the arenas(角斗场)of ancient Rome.After the fall of the Roman Empire,hippos weren't seen in Europe again until a few zoos began to exhibit them in the mid 1800s.
All the various uses and abuses of hippos through the centuries have made their population fall greatly.Where they do occur,mostly in national parks,they live in such high density that they make the grasslands bare.This causes other grass-eating animals to go farther for food,and hippos,which can't live far from water,destroy their own feeding grounds.
32.In Africa,hippos became extinctD.
A.around the 1850s
B.in the 13th century
C.about 4,000years ago
D.in the early 19th century
33.Apart from protecting crops,what's the main reason for people to kill hippos?B
A.To save other animals.
B.To satisfy personal demands.
C.To look for guidance after death.
D.To follow the routine established by the Egyptians.
34.The underlined word in the last paragraph can be replaced byA?
A.concentration     
B.altitude      
C.level          
D.temperature
35.What problems do hippos lead to?A
A.They eat up the grass in their habitats.
B.They always destroy other animals'food.
C.They stop other animals from drinking water.
D.They grow too quickly for the land to support.
6.
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G.formationH.deliberateI.similarJ.advantageousK.surprised
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B.take off their well-designed earphones
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41.A.dressed upB.laid offC.let outD.turned in
42.A.disgustingB.conventionalC.annoyingD.different
43.A.holeB.trapC.pocketD.lap
44.A.whenB.untilC.sinceD.after
45.A.beginsB.decidesC.expectsD.fails
46.A.biteB.scratchC.shaveD.beat
47.A.comfortableB.secureC.attractiveD.peaceful
48.A.lendingB.givingC.owingD.teaching
49.A.angerB.prideC.cautionD.trust
50.A.permanentlyB.quicklyC.graduallyD.frequently
51.A.inB.beneathC.aboveD.off
52.A.businessB.entertainmentC.relaxationD.sport
53.A.understandB.satisfyC.shareD.accept
54.A.hunterB.schoolmanC.explorerD.volunteer
55.A.discussB.appreciateC.protectD.associate
56.A.picnicB.holidayC.talkD.hug
57.A.inconvenientB.wrongC.controversialD.urgent
58.A.reasonB.courseC.wayD.result
59.A.animalsB.schoolsC.childrenD.families
60.A.guaranteeB.passC.returnD.tell

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