2022年吉林省白城市大学英语6级大学英语六级模拟考试(含答案)

2022年吉林省白城市大学英语6级大学英语六级模拟考试(含答案)学校:________班级:________姓名:________考号:________

一、2.ReadingComprehension(SkimmingandScanning)(20题)1.

TheThirdRevolutioninmodemhumanhistorywillcomein2020.

A.YB.NC.NG

2.

ThelayerthatservestoshieldEarthfromtheSun'sharmfulultravioletraysiscalled______.

3.

Dihydrogenmonoxidecanacceleratecorrosionandrusting,andcauseseverburnsandevendeathfrominhalation.

A.YB.NC.NG

4.

TheStateofRondoniaandParaStatebelongtothewestAmazon.

A.YB.NC.NG

5.FactsaboutDepression

Inanygivenone-yearperiod,9.5%ofthepopulation,orabout18.8millionAmericanadults,sufferfromadepressiveillness.Theeconomiccostforthisdisorderishigh,butthecostinhumansufferingcannotbeestimated.Depressiveillnessesofteninterferewithnormalfunctioningandcausepainandsufferingnotonlytothosewhohaveadisorder,butalsotothosewhocareaboutthem.Seriousdepressioncandestroyfamilylifeaswellasthelifeoftheillperson.Butmuchofthissufferingisunnecessary.

Mostwithadepressiveillnessdonotseektreatment,althoughthegreatmajority—eventhosewhosedepressionisextremelysevere—canbehelped.Thankstoyearsoffruitfulresearch,therearenowmedicationsandpsychosocialtherapiessuchascognitive/behavioral"talk"orinterpersonalthateasethepainofdepression.

What'sDepressiveDisorder?

Adepressivedisorderisanillnessthatinvolvesthebody,mood,andthoughts,ftaffectsthewayapersoneatsandsleeps,thewayonefeelsaboutoneself,andthewayonethinksaboutthings.Adepressivedisorderisnotthesameasapassingbluemood.Itisnotasignofpersonalweaknessoraconditionthatcanbewilledorwishedaway.Propelwithadepressiveillnesscannotmerely"pullthemselvestogether"andgetbetter.Withouttreatment,symptomscanlastforweeks,months,oryears.Appropriatetreatment,however,canhelpmostpeoplewhosufferfromdepression

TypesofDepression

Depressivedisorderscomeindifferentforms,justasisthecasewithotherillnessessuchasheartdisease.Briefdescriptionsofthemostcommontypesofdepressivedisordersaregivenbelow.However,withinthesetypestherearevariationsinthenumberofsymptoms,theirseverity,andpersistence.

Majordepressionismanifestedbyacombinationofsymptoms(seesymptomlist)thatinterferewiththeabilitytowork,study,sleep,eat,andenjoyoncepleasurableactivities.Suchadisablingepisodeofdepressionmayoccuronlyoncebutmorecommonlyoccursseveraltimesinalifetime.

Alessseveretypedepression,dysthymia,involveslong-term,chronic(慢性的)symptomsthatdonotdisable,butkeeponefromfunctioningwellorfromfeelinggood.Manypeoplewithdysthymiaalsoexperiencemajordepressiveepisodesatsometimeintheirlives.

Anothertypeofdepressionisbipolardisorder.Notnearlyasprevalentasotherformsofdepressivedisorders,bipolardisorderischaracterizedbycyclingmoodchanges:severehighs(mania)andlows(depression).Sometimesthemoodswitchesaredramaticandrapid,butmostoftentheyaregradual.

Wheninthedepressedcycle,anindividualcanhaveanyorallofthesymptomsofadepressivedisorder.Wheninthemaniccycle,theindividualmaybeoveractive,over-talkative,andhaveagreatdealofenergy.Maniaoftenaffectsthinking,judgment,andsocialbehavior.inwaysthatcauseseriousproblemsandembarrassment.Forexample,theindividualinamanicphase(状态)mayfeelelated,fulltograndschemesthatmightrangefromunwisebusinessdecisionstoromanticsprees(放纵).Mania,leftuntreated,mayworsentoapsychoticstate.

SymptomsofDepressionandMania

Noteveryonewhoisdepressedormanicexperienceseverysymptom.Somepeopleexperienceafewsymptoms,somemany.Severityofsymptomsvarieswithindividualsandalsovariesovertime.

Depression

•Feelingsofhopelessness,pessimism

•Feelingsofguilt,worthlessness,helplessness

•Lossofinterestorpleasureinhobbiesandactivitiesthatwereonceenjoyed,includingsex

•Decreasedenergy,fatigue,being"sloweddown"

•Difficultyconcentrating,remembering,makingdecisions

&n

A.YB.NC.NG

6.

Moneylaunderersknowhowtomovemoneybetweencountrieswithdifferentlawstocoveruptheaudittrail.

A.YB.NC.NG

7.

CatherineFredmanwasnotworriedaboutpayingMr.Fredman's______.

8.

MusiclyricsofEminemarefullof______,buttheyareverypopular.

9.

Mr.Symondsandhisassociateswere______withtheauthor'sreplies.

10.

Feverisa_____________toinfection,andnomajorproblemsgenerallycomefromfeveritself.

11.

In2001,R-ratedfilmsaccountedforthemajorityofHollywoodfilmsbecausebothdomesticandforeignmarketswereinfavorofactionmovies.

A.YB.NC.NG

12.

Ifyoufailtosay"thankyou"tothereceptionists,theywillhavenegativeimpressionsofyou.

A.YB.NC.NG

13.

WhatdoesMr.dewahlthinkisthereasonthatJoostisignoringthetwobusinessmodels?

A.AllpeoplearefondofsimplywatchingTV.

B.TheyareirrelatedwithpleasuresderivedfromwatchingTV.

C.ItispossibleforpeopletoturnonTVtodayandwatchittomorrow.

D.TVismorerelaxedthanYouTubewhilethebosshassteppedout.

14.

TheArcticiswarmingfasterthantherestoftheworld.

A.YB.NC.NG

15.

Thereisahigherprobabilityforpeopletoinviteyoutotheirpartiesinthefutureifyou______atparties.

16.PassageOne

Amazonrainforest,normallyoneoftheworld'swettestregions,showstheweathercycleisswingingtooneextremeratherthansignalingclimatechange,localmeteorologistssaidThursday.WaterlevelsontwomajorAmazontributaries,MadeiraandSolimoes,droppedtorecord--38-yearlowsrespectively,creatinglongdelaysinfivertraffic,themainform.ofregionaltransport.

Dryweatheralsofannedhugeforestfires,notablyintheremotewesternStateofAcre.ButweatherforecastersaddedthatelsewhereincontinentallysizedBrazil,seasonalspringrainshadstartedinthesouthandwerespreadingnorthwardsthroughBrazil'smajorcoffeebeltandgraduallyintosoybeanareasinthecenter-west."TheAmazondroughtshowsextremeclimatevariability,notclimaticchange,"saidJoseMarengo,researcherattheWeatherForecastingandClimaticStudiesCenter,partoftheNationalInstituteofSpaceResearch.MarengosaidthatnormalrainswereforecastforthesouthAmazon--theStatesofAcreandRondonia,southernpartofParaStateandnorthernpartofMatoGrossoState.

"RainisforecastinAcreinthenextcoupleofweeks,"hesaid,addingthattheregionisnormallydrybetweenJuneandSeptemberandwettestinDecemberandJanuary.ButweareabitworriedthattherecouldbelessrainthanusualatthemouthoftheAmazon,aroundBelem,hesaid,notingthatextremeclimaticeventswereoccurringmorefrequently,"Wecouldbeseeingthefirstsymptomsofchangingcycles."MeteorologistsdiscountedalinkbetweenunusuallyseverehurricanesintheGulfofMexicoanddroughtintheAmazon.

DryweatherintheAmazonislinkedtowarmeroceansurfacetemperaturesinthePacificandtolowsunspotactivity,saidExpeditoRebello,headofappliedmeteorologyatthegovernment'sNationalInstituteofMeteorologyinBrasilia."It'saphenomenal(不同寻常的)droughtandcouldbelinkedtoawarmerPacificandlittlesunspotactivity,"Rebellosaid,notingextremelylowwaterlevelsintheAmazon.Butheaddedthattheweathercyclewouldreachalownextyearandthenstarttomoderate.PauloEtchitchury,directorofprivatemeteorologistsSomar,saidthatthePacificshouldstarttoenteracoolerperiodnextBraziliansummerandthiscouldresultinaweakLaNinaweatherpattern."Itwon'taffectsummerrainsandit'sstillveryearlytotalkaboutnextwinter,"hesaid,addingthatLaNinadoesn'tnecessarilysignalacoldwinterandextrariskoffrostdamagetoBrazil'scoffeecrop,theworld'sbiggest.

BrazilwasinatransitionalperiodbetweenthedryMay/AugustwinterandrainyspringwhichstartedinsouthBrazilinSeptember,Etchitchurysaid.HesaidthatthisyearweatherconditionsareingeneralseasonallynormalinBrazil'smainfarmingareas,exceptthatdroughtintheAmazoncouldaffectMateGrosso,Brazil'smainsoystate."Rainsinthesoutharereplenishing(补充)awaterdeficitandprovidingreservesforsummersoyandcomharvests,"hesaid,adding,"LastSeptemberwashotanddryandpeoplewereworriedaboutdroughtdamagetocropflowering."

PassageTwo

Eventoday,manyexpertssaywomenscientistsareoftennottreatedfairly.TheWashingtonPostnewspaperreportedastudyaboutthenumberofresearcharticlespublishedinmedicalmagazinesinwhichawomanwasthemainwriter.Womenwerethemainwritersonlytwenty-ninepercentofthetime.NancyAndreasenisascientistattheUniversityofIowa.ScientistslikeMissAndreasenoftensendstoriesabouttheirresearchtospecialprofessionalpublications.MissAndreasensaysherresearchispublishedmoreoftenwhenshesignsthemasN.C.AndreasenratherthanNancyAndreasen.Inthatway,theeditorsofthepublicationsdonotknowifthewriterisamanorawoman.

Womenalsoreceivefewerpatentsfortheirinventions.Ap

A.YB.NC.NG

17.

Whetheritisadvantageoustoapplyingearlydependsuponthe______.

18.

Accordingtosomeresearchers'criteria,gossipsaboutfamouspeoplearenotrealgossips.

A.YB.NC.NG

19.

Accordingtosomeexpertsinfitnessthosewhohavenodiseasearehealthy.

A.YB.NC.NG

20.

Ourabilitytothinkisimprovedwhen______.

A.weobservetheworldmorewisely

B.ourabilitytowriteisimproved

C.whatwespeakbecomesconvincing

D.wewriteonpaperinsteadofoncomputer

二、3.ListeningComprehension(20题)21.(26)

A.Becauseshecouldplaycomputergames.

B.Becauseshecouldplayonlinegames.

C.Becauseshecouldbecomeeverricher.

D.Becauseshecouldbecomeacomputerprogrammer.

22.(25)

A.Walkingthedog.

B.Cuttingthegrass.

C.Watchingthechildren.

D.Feedingthefish.

23.【B2】

24.(29)

A.Castles'structureandtheeatinghabitinthem.

B.Castles'structureandpeoplewholivedinthem.

C.Castles'structureandthelivesinthem.

D.Whypeoplebuiltcastlesandcastles'structure.

25.(24)

A.Whyspeciesdon'tavoidextinctionbyadapting.

B.Whyspeciesbecomeextinctattheratetheydo.

C.Whyhumansaren'textinct.

D.Howmanyspeciesaren'textinct.

26.听力原文：W:HowdoyoulikeyournewtenantwhomovedtoyourapartmentlastMonday?

M:Well,sheisanicelady,thoughI'mhavingahardtimegettingusedtoher.

Q:What'stheman'sproblem?

(13)

A.Heishavingahardtimelettinghisapartment.

B.Heprefershisoldtenanttothenewone.

C.Heisnotaccustomedtolivingwiththenewtenantyet.

D.Hedoesn'twanttolethisapartmenttoher.

27.(34)

A.Turningrightataredlight.

B.Drivinginfreewayswithoutalocaldriver'slicense.

C.Passingaschoolbusthatislettingoff.children.

D.Alloftheabove.

28.(21)

A.Whyspeciesdon'tavoidextinctionbyadapting.

B.Whyspeciesbecomeextinctattheratetheydo.

C.Whyhumansaren'textinct.

D.Howmanyspeciesaren'textinct.

29.(31)

A.Heworkedforamedicalperiodical.

B.Hepublishedapaperaboutcomputerscience.

C.Hesuggestedalinkbetweensmokeandlungcancer.

D.Heopenedahospitalwithhispartner.

30.(32)

A.Hewasoneofthebest-educatedmenoftheWest.

B.Hewasthebest-knownlawyerinIllinois.

C.HewastheonlyUnitedStatesPresidentwhoWasbornintoapoorfamilyandhadlittleformaleducation.

D.Hewasoneoftheworld'sgreatestmenofalltime.

31.听力原文：F:Youknow,thenoiseinmydormbasreallygottenoutofcontrol.MyroommateandIcanrarelygettosleepbeforemidnight.

M:Whydon'tyoutaketheproblemupwiththedormsupervisor?

Q:Whatdoesthemansuggestthewomando?

(13)

A.Totalkwithherroommate.

B.Totalkwiththenoisemaker.

C.Totalkwiththedormsupervisor.

D.Totalkwithallthestudentsinthedorm.

32.(13)

A.ThewomanhastalkedwithManagerLionceabouttheproposal.

B.ThewomancalledManagerLiat1:30totalkabouttheproposal.

C.ThewomanwillnotknowManagerLi'sdecisionuntil1:30.

D.Thewomandidn'tgetthroughManagerLi'ssecretaryatlunchtime.

33.听力原文：W:Oh,Jack.I'mgladIcaughtyou.IwanttotellyouIhavetoskipthehistorystudygroupsessiontonight.

M:Really?That'stoobad.Aren'tyoufeelingwell?

W:Oh,it'snothingbad.There'sgoingtobeapublicmeetingdownthetownhall.Thestatesenatorfromthisareaisgoingtobethere.Shehasthismeetingthreeorfourtimesayeartospeakwithherconstituency.

M:Isthatwhatyou'dliketodowithyourevening,goingtolistentoapolitician's...

W:Actually,it'saclassassignment.ProfJackson,he'steachingthatpoliticalscienceseminarI'mtaking.Hetoldallofusintheseminartogotohearwhatthesenatorhastosaytonightandalsowriteupareportabouttheissuespeoplebringup.

M:Oh,likemedicalcare,andtaxand...?

W:Right,aslongasI'mthere,IthinkI'dliketobringupgovernmentfundingforstateuniversities.Thetuitionkeepsgoingupandit'sgettingharderandharderforalotofstudentstoaffordit.

M:Tellmeaboutit.

W:Anyway,Iwanttodoareallygoodjobonthisreport.IneedtogetaletterofrecommendationfromProfJacksonforgraduateschool.SoIguessI'dbettershowuptheretonightandseewhat'sgoingon.

M:Yeah,but,whataboutthehistorytest?

W:Well,Ialreadyputsometimeinonthatthismorning.SoIthinkbytomorrowafternoon,I'llbeready.

(23)

A.Shehasseenadoctorrecently.

B.She'sconcernedaboutmedicalcare.

C.She'sunabletoattendthestudysession.

D.Shementionstheneedforsomemedicaltests.

34.听力原文：W:Iwonderifyouhavetimetogototheschooltomeetourdaughter.Shehasmissedthebus.

M:Idowishto,butIhaven'tgotmyreportreadyyet.Mybossneedsittomorrow.

Q:Whatdoesthemanmean?

(18)

A.Hewillgotoinsteadofhiswife.

B.Hewillgotowhenhefinisheshisreport.

C.Hewillaskhisbossforaleave.

D.Itwouldbebetterforherwifetogoto.

35.听力原文：Forthoseofyouwhowerebornintheyearofthepig,goodluckandmuchsuccess!Thisisyouryear.

WhentalkingtoaWesterner,however,you'vegottobealittlecarefulwhenyoutalkaboutpigs.Chinesepeopleviewthepigasasmartandluckyanimal.Westernideastendtobealittlemorenegative.

ApigintheWestisseenasadirty,lazy,andfatanimal.Ifanyoneevercalledyouapig,youwouldn'tbesmiling.Whenapersondoesn'tlikesomeone,sometimeshewillcallthatpersonapig.

IfyouevermeetaWesternerwhowasbornintheyearofthepig,don'tsay"Oh,you'reapig!"MostWesternerswillbeunderstanding.Theywillbesurethatyoumadesomekindofamistake.However,don'ttakeanychances.Youmightjustoffendsomeonewhodoesnotshareyourpositiveideasaboutpigs.

(30)

A.Becausetheyworshippigsbestofall.

B.Becausetheyconsiderpigsasbadanimals.

C.Becausetheyaren'tusedtotalkingaboutpigs.

D.Becausetheydon'tlikethetopicaboutpigsatall.

36.

【B8】

37.听力原文：W：weoughttostopbuyingthiskindofcoffee．Italwaystastesterrible．

M：Maybeweshouldgetanewmachineinstead.

Q：Whatdoesthemansuggest?

(18)

A.Theyoughttomakefreshcoffee.

B.Theyoughttotrysomeotherkindsofcoffee.

C.Themachineshouldbecleaned.

D.Themachineshouldbereplaced.

38.

【B10】

39.【B10】

40.听力原文：M:DoyouthinkPhilcangetascholarshiptoYale?

W:Hedoesn'tstandachance.

Q:Whatdoesthewomanmean?

(16)

A.IfPhilislucky,hemightgetascholarship.

B.ThereisnowayinwhichPhilcanwinascholarship.

C.Philisnotgoingtochancehisluckandtryforascholarship.

D.Philisnotbeinggivenachancetogetascholarship.

三、4.ReadingComprehension(ReadinginDepth)(20题)41.

Whichofthefollowingstatementsistrueaccordingtothetext?

A.Doctorswillbeheldguiltyiftheyrisktheirpatients'death.

B.Modernmedicinehasassistedterminallyillpatientsinpainlessrecovery.

C.TheCourtruledthathigh-dosagepain-relievingmedicationcanbeprescribed.

D.Adoctor'smedicationisnolongerjustifiedbyhisintentions.

42.Wecaninferfromthepassage______.

A.howtoavoidnaggingfamilymembers

B.howtosilencegossipingfriends

C.howtomakeaharmlessrevenge

D.howtodealwithbothersomecoworkers

43.SectionB

Directions:Thereare2passagesinthissection.Eachpassageisfollowedbysomequestionsorunfinishedstatements.ForeachofthemtherearefourchoicesmarkedA,B,CandD.Youshoulddecideonthebestchoice.

ParadiseLostisMilton'smasterpiece.ItsstoryistakenfromtheBible,about"thefallofman",thatis,howAdamandEvearetemptedbySatantodisobeyGodbyeatingtheforbiddenfruitfromtheTreeofKnowledge,andhowtheyarepunishedbyGodanddrivenoutofParadise.InMilton'swords,thepurposeofwritingtheepicsto"justifythewaysofGodtomen",butapparently,Miltonisutteringhisintensehatredofcruelnessoftherulerinthepoem.BydepictingSatanandhisfollowersaswellastheirfieryutteranceandbraveactions,MiltonisshowingaPuritan's(清教徒的)revoltagainstthedictatorandagainsttheestablishedCatholicsandtheAnglicanChurch.

InthepoemGodisnobetterthanacruelandselfishruler,seatedonathronewithagroupofangelsabouthimsingingsongstopraisehim.Hislongspeechesarenotpleasingatall.HeiscruelandunjustinpunishingSatan.Hisangelsarestupid.ButSatanisbyfarthemoststrikingcharacterinthepoem,whorisesagainstGodand,thoughdefeated,stillpersistsinhis.fighting.

AdamandEveshowsMilton'sbeliefinthepowerofman.Goddeniesthemachancetopursueforknowledge.Itisthislongingforknowledgethatopensbeforemankindawideroadtointelligentandactivelife.IthasbeennotedbymanycriticsthatMilton'srevolutionaryfeelingsmakeshimforgetreligiousdoctrines(教条).TheangelswhosurroundtheGodneverthinkofexpressinganyopinionsoftheirown.TheimageofGodsurroundedbysuchangelsresemblesthecourtofanabsolutemonarch(君主).ButSatanandhisfollowers,whofreelydiscussallissuesincouncil,remindusofaRepublicanParliament.

Thispassageismostprobably______.

A.arevieworMilton'sParadiseLost

B.anintroductionofwhatParadiseLostisabout

C.adepictionofthecruelnessoftheBritishruler

D.partofanintroductiontoEnglishliterature

44.

Whyisknowledgeplayingadecisiveroleintheshiftingofpowerinalmostallestablishedinstitutions?

45.

Whatisthepoliticalimplicationofthedemographicchangeinthedevelopedcountries?

A.Winningthesupportofolderpeoplewillbecomecrucialinpolitics.

B.Pensionpolicywillbecomeakeyissueinelections.

C.Immigrationshouldbebannedtomaintaintheworkforce.

D.Thedemographicchangewillchangethepoliticallandscapegreatly.

46.TheexampleofHenryFord'sassemblylinesuggeststhatthesuccessintheautoindustrywasbuilton______.

47.

AccordingtothePara.2,whenitcomestogapyears,______.

A.thepopularityofgapyearsresultsfromanincreasingnumberofcharities

B.PrinceWilliamwasworkinghardduringhisgapyear

C.gapyearsarcnotasfashionableastheyweretenyearsago

D.awell-structuredgapyearisaguaranteeofuniversitysuccess

48.

【C9】

49.Whenmillionsofrodsinoureyesareatworkindarkness,wecansee______.

50.Thefactthatmagicisafrequentsourceofwordsofpraisesuggeststhatpeople______.

A.lacklinguisticoriginality

B.havealwaysbeeninterestedinmagic

C.arebecomingmoresuperstitious

D.areinterestedinmagicwhenyoung

51.Theworldisundergoingtremendouschanges.Theriseofglobalization,botheconomicandculturaltrendthathassweptthroughouttheworld,hasforgednewgroundasweenterthe21stcentury.Butaretheeffectsofglobalizationalwayspositive?Somesayno.

MichaelTenet,headoftheInternationalInstituteforForeignRelationsinAtlanta,isworriedaboutcurrentresentmentthroughouttheworldtowardtheriseofglobalization."Eversincethe1980sandtheeconomicbreakdownoftheAsianTigersinthelate1990s,therehasbeenareevaluationoftheroleofglobalizationasaforceforgood,"hesaid."Incomeinmanycountrieshasdeclinedandthegapbetweenthemostrichandthemostpoorhasbeenworsened.Withoutfurtherinterferencebygovernments,wecouldseeatragedyexpressedinanincreasedlevelofpovertythroughouttheLatinAmericaandAsia."

YetGeorgeFrank,aninfluentialeconomistwhoworksonWallStreet,seesnosuchdanger."Economicliberalization,increasedtransparencyandmarket-basedreformshavepositiveeffectinthelongrun,evenifmarketmechanismscanproduceshorttermdestabilizationproblems,"hesaid."Whatismostimportantisthatbarrierstotradecontinuetofallsothatactivecompetitionforconsumergoodsreducespricesandinturnraisestheaveragelevelofincome."

Othersfeelthatglobalization'sculturalimpactmaybemoreimportantthanitseconomicimplications.JaniceYawee,anativeofAfrica,feelsstronglythatglobalizationisweakeningherlocalcultureandlanguage."Mostoftheworld'sdialectswillbecomeextinctunderglobalization.WearepavingtheworldwithMcDonald'sandEnglishslang.Ittearsmeupinside,"shesaid.

However,ignoringthepoliticaldimensionsofglobalizationshasalreadyhaditscost.NowherewasthismadedearerthanintheEastAsianeconomiccrisisofthelate1990's—particularlyinIndonesia.Inthewakeofthatcrisis,thePresidentSuhatro'sregimewasoverthrown,andtheentirecountryhasbeenthrownintoamess.TheIndonesianeconomyhascontractedalmost50percent,throwingtensofmillionsofpeoplebelowthepovertyline.

Governmentsofdifferentcountrieshavehadmixedresponsestothewaveofglobalization.TheUnitedStatesisgenerallyseenasanactiveproponentofgreaterfreetrade,anditcertainlyhasenormousculturalinfluencebyvirtueofitsnearmonopolyonworldwideentertainment.SothechallengefacedbythenewBushadministrationisnotthechallengeofthe1990's.Butothercountries,mostnotablyinEuropeanddevelopingnations,havesoughttoreducetheimpactthatglobalizationhasontheirdomesticaffairs.

ItcanbeinferredthatMichaelTenet'sattitudetowardglobalizationisprobably______.

A.stronglyopposed

B.cautiouslyagreed

C.somewhatanxious

D.absolutelysupportive

52.

Themenwhohadsevenormoresiblingshadmorethan______theriskofdevelopingstomachcancer,comparedtomenwiththesameH.pyloristrainswhohadonetothreesiblings.

A.eighthB.oneC.forthD.twice

53.

Scientistshavediscoveredinthepastfewyearsthat______.

A.theexposureofDNAtothepublicisunnecessary

B.thetinycellinDNAisaneatlittlemachine

C.manactuallyknowsnothingaboutDNA

D.manhasmuchtolearnaboutDNA

54.

WhydoestheauthorsayNewtonhaduniquesenseofhumour?

55.

Thepassagesuggeststhatmostrainforestspeciesare______.

A.insectsB.bacteriaC.mammalsD.birds

56.

Thebesttitleforthepassagewouldbe______.

A.MedicalPractice

B.CleverAdvertising

C.Self-Medication

D.Self-Treatment

57.SectionB

Directions:Thereare2passagesinthissection.Eachpassageisfollowedbysomequestionsorunfinishedstatements.ForeachofthemtherearefourchoicesmarkedA,B,CandD.Youshoulddecideonthebestchoice.

Thefirstinnovationinthedesignofcombatbinoculars(双筒望远镜)inover200yearsisonthehorizon.Thedevice,called"talkingbinoculars",isderivedfromthestrategicsatellite-to-satellitecommunicationsprogram.Theideaistouseonepairofbinocularstoprojectalaserbeamtocarryascout's'observationstoasecondpairasthereceiver.

Militaryscoutstodaycannotuseradiosduringradiosilentscoutingmissionsinsideenemyterritorybecausetheenemycandetectandlocatetheirtransmissions.Withthenew"talking"binoculars,whenaforwardmilitaryscoutseestheenemythroughtransmittinglaserbinocularsanddepressesthetargetlocateandstorebutton,globalpositioningsystemtechnologywillmeasuretheenemy'stargetposition.Then,thebinocularsstoretheinformationanduseitsinvisiblelaserbeamtotransmittheenemy'spositiontoareceivingsetofbinoculars.Thereceivingscoutcanthenimmediatelytransmittargetdatabacktothelines.Themilitaryscoutwillnolongerneedmaps,havetodependonwrittennotes,orleaveapositiontoreportbacktothecommander.

Theinnovativebinocularsalsosolvetheaged-dataproblembyrelayingthemilitaryscout'sobservationsinnear-realtimetothecommanderinthetactical(战术的)operationscenter.Thescoutdoesnotneedtopersonallyreturntolinestomakeareportwhichisagedbythetimethecommanderreceivesit.

"Enemydetectionofthebinocularsisnearimpossiblebecausetheweaklaserbeamisprojectedfrompointtopoint,"Stricklandsaid."Anenemysearchingforaweak'lasersourcerequiressensitiveopticaldetectorsandmustbenearthereceivertodetecttheweaklaser.Itwillbemucheasierforthescouttoseetheenemythanfortheenemytodetectthelaserbeam.Bycomparison,radiobroadcastistransmittedinalldirections,allowingeasydetectionbyapreparedenemyfromallangles."hesaid.

Digitallasercommunicationsisavaluabletechnology.Itsadvantagestemsfromprovidinghighdataratecommunicationscapabilitywhenthemissionpreventsscoutsfromusingtheirradios.Aweaklaserbeamcancarrydigitizedvoicemessages,targetingdataandhigh-qualityvideoimagesatextremelyhighdatarates.

Militaryplannersarealreadyenvisioningadaywhenallcommunicationsonabattlefield,betweentanksorbetweentanksandhelicopters,tonameonlytwoexamples,aretransmittedbylaser.Theoretically,alaser-basedcommunicationssystemcouldhandle200,000voicechannels.Currently,eventhemostpowerfulhigh-capacitylasers,capableoftransmitting100TVchannels,weighonly29pounds,sotheyareeasilydeployedonvehiclesoraircraft.Inthefuture,lasersmayalsotransmitinformationdirectlyfromorbitingsatellites.

Withoutthetalkingbinoculars,ascoutduringradiosilentscoutingmissions______.

A.canbeeasilydetectedandlocatedbytheenemy

B.isnotabletodeterminetheenemy'stargetposition

C.hastomakearec