文都英语四级CET4真题.docx

文都英语四级CET4真题.docx

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文都英语四级CET4真题

大学英语四级模拟试题（7）

Directions:

Therearefourreadingpassagesinthispart.Eachpassageisfollowedbysomequestions.ForeachquestiontherearefoursuggestedanswersmarkedA,B,CandD.YoushouldchoosetheonebestanswerandblackenthecorrespondingletterontheANSWERSHEETwithapencil.

Childrenarearelativelymoderninvention.Untilafewhundredyearsagothey

looklikeadult,wearinggrown-upclothesandgrown-upexpressions,performinggrown-uptasks.Childrendidnotexistbecausethefamilyasweknowithadnotevolved.

Childrentodaynotonlyexist;theyhavetakenover,innoplacemorethaninAmerica,andatontimemorethannow.ItisalwaysKids'Countryhere.Ourcivilizationischild-centered,child-obsessed.Akid'sbodyisourphysicalideal.InKids'Countrywedonotpermitmiddle-aged.Thirtyispromotedover50,but30knowsthatsoonhistimetobeovertakenwillcome.

Wearethefirstsocietyinwhichparentsexpecttolearnfromtheirchildren.Suchatopsy-turvysituationhascometoabortatleastinpartbecause,unliketherestoftheworld,oursisanimmigrantsociety,andforimmigrantstheonlyhopeisinthekids.IntheOldCountry,thatis,Europe,hopewasinthefather,andhowmuchwealthhecouldaccumulateandpassalongtohischildren.InthegrowthpatternofAmericaanditsever-expandingfrontier,theyoungmanwaseveradvisedtoGOWEST;thefatherwaseverinheritingfromhisson.Kid'sCountrymaybetheinevitableresult.

Kid'sCountryisnotallbad.AmericaisthegreatestcountryintheworldtogrowupinbecauseitisKid'sCountry.Wenotonlywearkids'clothesandeatkids'food;wedreamkids'dreamsandmakethemcometrue.Itwas,afterall,aboys'gametogotothemoon.

Ifintheolddayschildrendidnotexist,itseemsequallytruetodaythatadults,asaclass,havebeguntodisappear,condemningallofustoremainboysandgirlsforever,jogginganddoingpush-upsagainsteternity.

21.TheauthorusestheexampleoftheRenaissancepaintingtoshowthat.

A.adultsshowedlessconcernforchildrenthanwedonow

B.adultsweresmallerandthinneratthattime,buttheystillhadlotsofworktodo

C.childrenlookedandactedlikeadultsatthattime

D.childrenwerenotpermittedtoappearinfamilypaintingsatthattime

22.Inthethirdparagraph,“theOldCountry"iscontrastedwithAmerica.

A.toshowdifferencesinfamilysize

B.toshowdifferencesinattitudestowardsfamilyrelations

C.toshowtwokindsofgeography

D.toshowtwodifferentkindsofeconomicrelationsbetweengenerations

23.Goingtothemoonisanexampleof.

A.America'sdreamsandcreativity

B.America'schildishandqueerbehavior

C.WhyAmericahasn'tgrownup

D.WhyAmericaisconsideredasthegreatestcountryintheworld

24.Accordingtothepassage,whichofthefollowingistrue?

A.Itisverydifficultforthemiddle-agedtoliveinAmerica

B.AmericaisKid'sCountrybecausethemajorityoftheAmericanpopulationarechildren

C.Kid'sCountrywastakingshapeinAmericawhenimmigrantspouredintothecountry.

D.AmericaismoreofKid'sCountrythananyothercountriesintheworld

25.Bysaying“condemningallofustoremainboysandgirlsforever,jogginganddoingpush-upsagainsteternity",theauthormeansthat.

A.shethinkspeopleshouldn'tbesoconcernedaboutphysicalfitness

B.shefeelstoooldandtiredtodosuchhardexercise

C.Americansocietyisoveremphasizingyouthandphysicalappearance

D.WhathappenedtochildrencenturiesagomayoccurtoadultsinAmericasoon

Passage2

Themodernageisanageofelectricity.Peoplearesousedtoelectriclights,radios,televisions,andtelephonesthatitishardtoimaginewhatlifewouldbelikewithoutthem.Whenthereisapowerfailure,peoplegropeaboutinflickeringcandlelight,carshesitateinthestreetsbecausetherearenotrafficlightstoguidethem,andfoodspoilsinsilentrefrigerators.

Yetpeoplebegantounderstandhowelectricityworksonlyalittlemorethantwocenturiesago.Naturehasapparentlybeenexperimentinginthisfieldformillionsofyears.Scientistsarediscoveringmoreandmorethatthelivingworldmayholdmanyinterestingsecretsofelectricitythatcouldbenefithumanity.

Alllivingcellssentouttinypulsesofelectricity.Astheheartbeats,itsendsoutpulsesthatcanbemeasuredandrecordedonthesurfaceofthebody.Whenthepulsesarerecorded,theyformanelectrocardiogram,whichadoctorcanstudytodeterminehowwelltheheartisworking.Thebrain,too,sendsoutbrainwavesofelectricity,whichcanberecordedinanelectroencephalogram,Theelectriccurrentsgeneratedbymostlivingcellsareextremelysmall-oftensosmallthatsensitiveinstrumentsareneededtorecordthem.Butinsomeanimals,certainmuscledcellshavebecomesospecializedaselectricalgeneratorsthattheydonotworkasmusclecellsatall.Whenlargenumbersofthesecellsarelinkedtogether,theeffectcanbeastonishing.

Theelectriceelisanamazinglivingstoragebattery.Itcansendajoltofasmuchaseighthundredvoltsofelectricitythroughthewaterinwhichitlives.（Anelectrichousecurrentisonlyonehundredtwentyvolts.）Asmanyasfour-fifthsofallthecellsintheelectriceel'sbodyarespecializedforgeneratingelectricity,andthestrengthoftheshockitcandelivercorrespondsroughlytothelengthofitsbody.

26.Whatisthemainideaofthepassage?

A.Electriceelsarepotentiallydangerous.

B.Biologyandelectricityappeartobecloselyrelated.

C.Peoplewouldbeatalosswithoutelectricity.

D.Scientistsstillhavemuchtodiscoveraboutelectricity.

27.TheauthormentionsallofthefollowingasresultsofablackoutEXCEPT.

A.refrigeratedfooditemmaygobad

B.trafficlightsdonotwork

C.peoplemustrelyoncandlelight

D.elevatorsandescalatorsdonotfunction

28.Whydoestheauthormentionelectriceels?

A.Towarnthereadertostayawayfromthem.

B.Tocomparetheirvoltagetothatusedinhouses.

C.Togiveanexampleofalivingelectricalgenerator.

D.Todescribeanewsourceofelectricalpower.

29.Howmanyvoltsofelectricitycananelectriceelemit?

A.1,000.

B.800.

C.200.

D.120.

30.Itcanbeinferredfromthepassagethatthelongeraneelisthe.

A.morebeneficialitwillbetoscience

B.morepowerfulwillbeitselectricalcharge

C.easieritwillbetofind

D.tougheritwillbetoeat

Passage3

AmericanScientistshavedevelopedanewkindofwirethatcancarrytelephonemessagesforlongdistances.Thenewfluorideglasswire,oropticalfibre,isamajorimprovementovertheopticalfibresnowusedinmanymoderncommunicationsystems.

Presentopticalfibresaremadefromsilicaglass.Theyarenotcostlytoproduce,butthesignalscarriedbythesesilicaopticalfibresweakenveryquickly.Arepeaterdevicemustbebuiltevery50kilometerstoincreaseoramplifythesignals'strength.Suchrepeaterdevicesarecostlyandtheyneedelectricalpower.Thiscreatesspecialproblemsforopticalfibresystemsthatcrossoceans.Longcopperwiresareneededtocarryelectricityfromshoretorepeaterdevicesundertheocean.Repairingtheunderwaterrepeatersiscostlyandtakesmuchtime.

Thenewfluorideopticalfibreisonlyalittlebiggeraroundthanahumanhair,yeteachcouldcarry10,000telephonemessagesatonetimeforthousandsofkilometers.Traditionalcoppertelephonewirescancarryonly4messages.Andunlikepresentsilicaopticalfibres,thenewfluorideglasswirescouldcarrymessagesforthousandsofkilometerswithveryfew,ifany,repeaterdevices.

Thenavyscientistsdevelopedthenewopticalfibresforsystemsthatcrossoceans,buttheysaidtherealsowouldbemanyotherusesforthefluorideglasswires.Thenewopticalwirescouldbeusedforlong-distancetemperaturesensingdevices.Theycouldbeusedinsomemedicaloperations.

Scientistscautionthatthenewfluorideopticalfibrestillisonlyexperiment.Researchershavenotyetbeenabletomakelongtinywiresfromfluorideglass.

31.Whichofthefollowingstatementsisnottrue?

A.Silicaopticalfibresarenotexpensivetoproduce.

B.Signalscarriedbysilicaopticalfibresareratherweak.

C.Additionaldevicesareneededforpresentopticalfibre/fibersystems.

D.Repeatersbringaboutspecialproblemsfortransoceaniccommunications.

32.Themajoradvantageoffluorideopticalfibres/fibersoversilicawiresisthatfluorideglass.

A.needsmuchfewer,ifany,repeaters

B.carriesmoretelephonemessages

C.islesscostlytoproduce

D.istinier

33.Thenewglasswirewasdesignedfor.

A.communicationssystemsthatcrossoceans

B.long-distancetemperaturesensingdevices

C.somemedicaloperations

D.replacingsilicaopticalfibres

34.Thefluorideopticalfibresisexperimentalbecausethenewglasswiremadesofor.

A.isquiteexpensive

B.cannotyetcarryenormousmessages

C.stillneedsrepeaters

D.isnotlongenough

35.Theauthor'smainideaisthat.

A.presentopticalfibresaremadefromsilicaglass

B.silicaopticalfibresneedrepeaterstoamplifythesignalscarried

C.Americanscientistshavedevelopedanewglasswiretocarrylong-distancetelephonemessages

D.thenewopticalfiberhadmanyuses

Passage4

Thereisnodoubtthatadults,andevenhighlyeducatedadults,varygreatlyinthespeedandefficiencyoftheirreading.Someproceedveryslowlythroughout;othersdashalongtooquicklyandthenhavetoregress.Poorreadersinparticularmaylacktheabilitytovarytheirmannerofreadingaccordingtothetypeofreadingmatterandtotheir