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.
A.indicator | B.predict | C.process | D.movement | E.adapt | F.tracked |
G.formation | H.deliberate | I.similar | J.advantageous | K.surprised |
Researchers studying fossils (化石) of the early ancestors of dogs that lived up to 40million years ago believe the predators (捕食性动物) evolved as a direct consequence of climate change.The study claims the (41)C transformed man's best friend from a creature that behaved more like a cat,into the canine (犬) we know and love today.
Ancestors of dogs living in North America 40million years ago were ambush (伏击式) predators-in a(n) (42)I way to cats'.But a million years later,the thick forest that once covered the continent began to give way to grasslands.This led to a(n) (43)G in the body shape and hunting behavior of dogs,turning them into animals that no longer (44)K their prey (猎物),but chased it down instead.
This evolutionary transition was (45)F by the scientists who examined the elbows and teeth of 32species of dogs that lived between 40million and two million years ago.
"The elbow is a really good (46)A of what carnivores (食肉动物) are doing with their forelimbs (前肢),which tells their entire (47)D abilities,"said Brown University's Christine Janis,who led the study.
The research was based on an analysis of fossil specimens (标本) in the American Museum of Natural History in New York.It suggests dog evolution was directly related to climate change.After all,it was not (48)J to operate as a pursuit-and-pounce predator until there was room to run.
If predators evolved with climate change over the last 40million years,the authors argue they may continue to (49)E in response to the present global warming trend.In this way,the results of the study could help (50)B how animals may look in the future.
A. | What's more | B. | That's to say | ||
C. | In other words | D. | Believe it or not |
If you have a (43)D handy,he'11 jump into it; if you don't,he's likely to stand there looking sad(44)Byou make him one.Once in it,he (45)A to purr(发咕噜声)almost before you gently touch his back,or(46)B his chin.Then he twists to get (47)A.He looks at you with wide open eyes of adoration(48)Byou the cat's long slow blink(眨眼)of extreme (49)D.After a while,little by little he (50)Cquiets down.If he senses it's all right,he may stay(51)A your lap for a cozy nap.But he is just as likely to walk away about his(52)A
In our household he isn't the only one who has that need:I(53)Cit and so does my wife.We know the need is necessary to any one age group.Still,because I am a(54)Bas well as a parent,I (55)D it especially with youngsters,with their sudden need for a (56)D,a warm lap,a hand held out,not because anything is(57)B,just because that's the(58)Cthey are.
There are a lot of things I'd like to do for all (59)C.If I could do just one,it would be this:to(60)Aevery kid,everywhere,at least one good purring every day.
Kids,like cats,need time to purr.
41.A.dressed up | B.laid off | C.let out | D.turned in |
42.A.disgusting | B.conventional | C.annoying | D.different |
43.A.hole | B.trap | C.pocket | D.lap |
44.A.when | B.until | C.since | D.after |
45.A.begins | B.decides | C.expects | D.fails |
46.A.bite | B.scratch | C.shave | D.beat |
47.A.comfortable | B.secure | C.attractive | D.peaceful |
48.A.lending | B.giving | C.owing | D.teaching |
49.A.anger | B.pride | C.caution | D.trust |
50.A.permanently | B.quickly | C.gradually | D.frequently |
51.A.in | B.beneath | C.above | D.off |
52.A.business | B.entertainment | C.relaxation | D.sport |
53.A.understand | B.satisfy | C.share | D.accept |
54.A.hunter | B.schoolman | C.explorer | D.volunteer |
55.A.discuss | B.appreciate | C.protect | D.associate |
56.A.picnic | B.holiday | C.talk | D.hug |
57.A.inconvenient | B.wrong | C.controversial | D.urgent |
58.A.reason | B.course | C.way | D.result |
59.A.animals | B.schools | C.children | D.families |
60.A.guarantee | B.pass | C.return | D.tell |