大学英语六级（2013年12月考试改革适用）模拟试卷246及答案解析.doc

1、大学英语六级（2013 年 12月考试改革适用）模拟试卷 246及答案解析(总分：118.00，做题时间：90 分钟)一、Writing(总题数：2，分数：4.00)1.Part I Writing（分数：2.00）_2.Directions：For this part，you are allowed 30 minutes to write an essay entitled How to Be Creative by commenting on this remark by a creativity expert，“If youre not prepared to be wrong，youl

2、l never come up with anything original”You should write at least 150 words but no more than 200 wordsWrite your essay on Answer Sheet 1（分数：2.00）_二、Listening Comprehens(总题数：11，分数：50.00)3.Part II Listening Comprehension_4.Section A_A.Neutral.B.Cautious.C.Favorable.D.Negative.A.It gives us sufficient i

3、nformation.B.It gives misleading information.C.It lets us know the best product.D.It fails to convince people.A.Advertisers.B.Manufacturers.C.Customers.D.Sellers.A.Because they provide misleading information.B.Because they dont tell us whichs the best product.C.Because the cost of advertising is add

4、ed to the price.D.Because they persuade people to do harmful things.A.In a department store.B.At a travel agency.C.At an airport ticket counter.D.At a hotel.A.Its too expensive.B.It would take too long.C.Nothings worth seeing.D.Hes been there before.A.They dont arrange accommodations.B.Everybody spe

5、aks English there.C.They arrange everything for you.D.The meals they provide are tasty.A.Its crowed with tourists.B.No flight goes there.C.The weather is warm.D.It costs much to go there.5.Section B_A.Pirates.B.Sailors.C.Manufactures.D.Merchants.A.The distance the merchandise had to be transported.B

6、.The number of insurance companies available at the time.C.The risk involved in transporting the goods.D.The type of ships used to transport the goods.A.They are more expensive than earlier policies.B.They remain much similar to earlier policies.C.They are cheaper than earlier policies.D.They greatl

7、y differ from the earlier policies.A.It was full of energy.B.It gave out heat.C.It could cure illness.D.It could keep them healthy.A.Because of the development of industry.B.Because of the pasteurization process.C.Because of the new discoveries.D.Because of the increasing number of cattle.A.A specia

8、l milk bottle.B.A method to take water out of milk.C.A way to kill bacteria in milk.D.Machines to fill bottles automatically.A.It will become less popular than it has been.B.It will be reformed in the near future.C.It will be more popular than before.D.It will always be important.6.Section C_A.Ameri

9、cas colleges and universities.B.Important and successful national leaders.C.Technical and managerial work force.D.Excellent professional work force.A.The state government.B.The federal government.C.The local government.D.The National Academy of Science.A.The Land Grant College Act. .B.The Act of 191

10、4.C.The Federal Family Education Loan Program.D.The Servicemens Readjustment Act of 1944.A.Jones.B.Smith.C.Campbell.D.Webber.A.Electoral register.B.Webber.C.Lerwick.D.Ex-pairing.A.For they are non-British names.B.For they only have 25,000 names on website.C.For most people get their names from their

11、 ancestors.D.For 25,000 names are difficult to generalize.A.Land formation.B.Geologic feature.C.Good dating.D.Fundamental technique.A.Geologists had a pretty good idea of the Grand Canyon.B.United States was formed 150 million years ago.C.United States was formed from sandstone.D.The sand had come f

12、rom an ancient mountain range. .A.Uranium-Lead Dating.B.Appalachian Mountains.C.The sand from the Grand Canyon.D.Huge rivers carried the sand west.A.To prove earths continents were once joined together.B.To prove that the grain type within sandstone.C.To determine the actual particles in the sandsto

13、ne.D.To determine where the actual particles came from.三、Reading Comprehensio(总题数：8，分数：60.00)7.Part III Reading Comprehension_8.Section A_The best time to view the Mona Lisa, according to a new book on the best times to do things, is around nine oclock on a Sunday morning: most tourists, it seems, d

14、ont realise that the Louvre is open then, while plenty of those who do will still be 1from the wine-fuelled excesses of Saturday night. The best night to eat at a restaurant is a Tuesday: no crowds, but better than a Monday, since many restaurants dont get weekend deliveries, making Mondays food les

15、s 2. Such is the 3but strangely compelling life-advice collected within the covers of Buy Ketchup In May And Fly At Noon, by Mark Di Vincenzo, a book that takes literally the cliche that timing is everything. But the 4of his outlook are universal. If theres a perfect time to ask for a pay rise or a

16、date, or a perfect moment in life to buy a house, have children or switch jobs, then theres hope for us all, if only we can time things right. Of course, theres no such 5art of timing that will make everything run smoothly. But one general principle that does 6from Di Vincenzos book is this: it pays

17、, in life, to learn when and how to deliberately 7out of synchronise (同步) with the rest of the world. Sometimes, this is a simple question of 8the crowds: obviously, thats the reason for holidaying off season, and its why Di Vincenzo recommends calling customer-service lines the moment they open, wh

18、en call volume is lowest. But theres more to the matter than 9avoiding peak times: with a little cunning (技巧), you can de-synchronise yourself from the crowd so as to make their 10behaviour work to your advantage.A) numerous I) recoveringB) avoiding J) emergeC) worldly K) merelyD) implications L) he

19、rdE) implied M) superiorF) secret N) converselyG) fresh O) fall H) engagements（分数：20.00）填空项 1:_填空项 1:_填空项 1:_填空项 1:_填空项 1:_填空项 1:_填空项 1:_填空项 1:_填空项 1:_填空项 1:_10.Section B_Think or Swim: Can We Hold Back the Oceans?A As the world gets warmer, sea levels are rising. It has been happening at a snails p

20、ace so far, but as it speeds up more and more low-lying coastal land will be lost. At risk are many of the worlds cities and huge areas of fertile farmland. The sea is set to rise a metre or more by the end of this century. And thats just the start. “Unless there is a rapid and dramatic about-face i

21、n emissionswhich no one expectsthe next century will be far worse than this century,“ says glaciologist (冰川学家) Bob Bindshadler of NASAs Goddard Space Flight Center, Maryland.B Throwing trillions of dollars at the problem could probably save big cities such as New York and London, but the task of def

22、ending all low-lying coastal areas and islands seems hopeless. Or is it? Could we find a way to slow the accelerating glaciers, drain seas into deserts or add more ice to the great ice caps of Greenland and Antarctica?C These ideas might sound crazy but we have got ourselves into such a bad situatio

23、n that maybe we should start to consider them. If we carry on as we are, sea levels will rise for millennia, probably by well over 10 metres. Slashing greenhouse gas emissions would slow the rise, but the longer we hesitate, the bigger the rise we will be committed to. Even if “conventional“ geo-eng

24、ineering schemes for cooling the planet were put in place and worked as planned, they would have little effect on sea level over the next century unless combined with drastic emissions cuts.D In short, if coastal dwellers dont want their children and grandchildren to have to abandon land to the sea,

25、 now is the time to start coming up with Plan C. So New Scientist set out in search of the handful of researchers who have begun to think about specific ways to hold back the waters.E One of the reasons why the great ice sheets of Greenland and Antarctica are already shrinking is that the ice is dra

26、ining off the land faster. Ice floating on the surrounding seas usually acts as a brake, holding back glaciers on land, so as this ice is lost the glaciers flow faster. The acceleration of the Jakobshavn glacier in Greenland is thought to be the result of warm currents melting the floating tongue of

27、 the glacier. Other outlet glaciers are being attacked in a similar way.F Mike MacCracken of the Climate Institute in Washington DC is one of those starting to think that we shouldnt just sit back and let warm currents melt ice shelves. “Is there some way of doing something to stop that flow, or coo

28、l the water?“ he asks.G Last year, physicist Russel Seitz at Harvard University suggested that the planet could be cooled by using fleets of customised boats to generate large numbers of tiny bubbles. This would whiten the surface of the oceans and so reflect more sunlight. MacCracken says the bubbl

29、es might be better arranged in a more focused way, to cool the currents that are undermining the Jakobshavn glacier and others like it. A couple of degrees of chill would take this water down to freezing point, rendering it harmless. “At least that would slow the pace of change,“ MacCracken says.H W

30、hat about a more direct approach: building a physical barrier to halt a glaciers flow into the sea by brute force? Bindshadler thinks that is a non-starter. “The ice discharge has many sources, mostly remote and in environments where barriers are not likely to work,“ he says. “Taking just the one ex

31、ample I know best, the Pine Island glacier in Antarctica drains into an ice shelf that at its front is 25 kilometres across and 500 metres thick, and moves at over 10 metres per day. The seabed there is 1000 metres down and is made of sediment (沉淀物) hundreds of metres thick and the consistency of to

32、othpaste.“ Not your ideal building site.I A slightly more subtle scheme to rein in the glaciers was proposed more than 20 years ago by Douglas MacAyeal of the University of Chicago. His idea is to fight ice with ice. The big outlet glaciers feed into giant floating shelves of ice, which break off in

33、to icebergs at their outer edges. MacAyeal suggested pumping water up from beneath the ice and depositing it on the upper surface, where it would freeze to form a thick ridge, weighing down the floating ice shelf. Add enough ice in this way, and the bottom of the ice shelf would eventually be forced

34、 down onto the seabed. Friction with the seabed would slow down the shelfs movement, which in turn would hold back the glaciers feeding into it. It would be like tightening an immense valve.J “I think its quite an inspired idea,“ says Bindshadler. But nobody has followed it up to work out how practi

35、cal the scheme would be. “On the back of an envelope it has promisebut these ice shelves are big. You would need a lot of drilling equipment all over the ice shelf, and my intuition is that if you look at the energetics of it, it wont work,“ Bindshadler says.K Even if we could apply brakes to glacie

36、rs, this would only slow down sea level rise. Could we do better than that and reverse itactually make the sea retreat? If you think of the sea as a giant bathtub, then the most obvious way to lower its level is to take out the plug.L “One of the oldest notions is filling depressions on the land,“ s

37、ays MacCracken. Among the largest of these is the Qattara depression in northern Egypt, which at its lowest point is more than 130 metres below sea level. Various schemes have been proposed to channel water from the Mediterranean into the depression to generate hydroelectric (水力的) power, and as a by

38、-product a few thousand cubic kilometres of the sea would be drained away. Unfortunately, thats only enough to shave about 3 millimetres off sea level: a drop in the ocean. And there would be grave consequences for the local environment. “The leakage of salt water through fracture systems would add

39、salt to aquifers (含水层) for good,“ says Farouk El-Baz, a geologist at Boston University who has studied the region.M Refilling the Dead Sea is no better. Because of surrounding hills, this depression could be filled to 60 metres above sea level, but even that would only offset the rise by 5 millimetr

40、esand drown several towns into the bargain.N The notion of engineering lower sea levels remains a highly abstract topic. “If the world doesnt control emissions, Im pretty sure that no geo-engineering solution will workand it would potentially create other side effects and false promises,“ says MacCr

41、acken. “But if we do get on a path to curbing emissions dramaticallydown 50 per cent by 2050, saythen the question becomes, can geo-engineering help with the hump were going to go through over the next few centuries?“（分数：20.00）(1).Sea levels are rising very slowly at present.（分数：2.00）填空项 1:_(2).Buil

42、ding physical barriers to keep glaciers may not be practical.（分数：2.00）填空项 1:_(3).Filling depressions can only offset very little rise of sea levels.（分数：2.00）填空项 1:_(4).One of the oldest ways to retreat the sea is to fill depressions on the land.（分数：2.00）填空项 1:_(5).The ice floating on the surrounding

43、 seas can stops the glaciers move away.（分数：2.00）填空项 1:_(6).Spending trillions of dollars at sea-level rise problem could probably save only a few cities.（分数：2.00）填空项 1:_(7).Someone advised to pump water up from beneath the ice to weigh down the floating ice shelf.（分数：2.00）填空项 1:_(8).A physicists sug

44、gestion to cool the planet is to generating tiny bubbles with fleets of customised boats.（分数：2.00）填空项 1:_(9).The idea of pumping water up from beneath the ice may not work because it consumes too much energy.（分数：2.00）填空项 1:_(10).People once believed that channeling water from the sea into some depre

45、ssion could both generate electricity and drain away some sea water.（分数：2.00）填空项 1:_11.Section C_Is that Folgers coffee in your cup or Maxwell House? Now you no longer have to rely on your nose to tell. Researchers have developed an analyzer that can distinguish between 10 commercial brands of coffee and can even tell apart coffee beans roasted at various temperatures for different times. The advance could help growers determine within minutes whether a particular batch of coffee is just