2021-2022年宁夏回族自治区中卫市大学英语6级大学英语六级知识点汇总（含答案）

2021-2022年宁夏回族自治区中卫市大学英语6级大学英语六级知识点汇总（含答案）学校:________班级:________姓名:________考号:________

一、2.ReadingComprehension(SkimmingandScanning)(20题)1.TheLewisCenteratOberlinisanenergy-efficientbuildingandthemajorenergyresourceofitisfrom

2.

People'sconfidenceinreadingmightbedestroyedby______.

3.

AccordingtoPrivacyInternationalinLondon,whichwordcandescribeGoogle'sattitudetoprivacyexactly?

A.Confusing.B.Adorable.C.Hypocritical.D.Indifferent.

4.Whatdoes"elevatorspeech"refertointhispassage?

A.Thespeechthatisgiveninanelevator.

B.Ageneralexplanationforone'sjobloss.

C.Theformalspeechontopicofunemployment.

D.Adetaileddescriptionforthedownsizing.

5.Bluetooth

Whenyouusecomputers,entertainmentsystemsortelephones,thevariouspieces-andpartsofthesystemsmakeupacommunityofelectronicdevices.Thesedevicescommunicatewitheachotherusingavarietyofwires,cables,radiosignalsandinfraredlight(红外线)beams,andanevengreatervarietyofconnectorsandplugs.

Theartofconnectingthingsisbecomingmoreandmorecomplexeveryday.AndBluetoothhasnowbecomeanewpopularmethodofconnectingdevicesthatcanstreamlinetheprocess.ABluetoothconnectioniswirelessandautomatic,andittakessmall-areanetworkingtothenextlevelbyremovingtheneedforuserinterventionandkeepingtransmissionpowerextremelylowtosavebatterypower.

BluetoothOperation

Bluetoothnetworkingtransmitsdatavialow-powerradiowaves.Itcommunicatesonafrequencyof2.45gigahertz(千兆赫)(actuallybetween2.402GHzand2.480GHz,tobeexact).Thisfrequencybandhasbeensetasidebyinternationalagreementfortheuseofindustrial,scientificandmedicaldevices(ISM).

Anumberofdevicesthatyoumayalreadyusetakeadvantageofthissameradio-frequencyband.Babymonitors(微型监视器),garage-dooropenersandthenewestgenerationofcordlessphonesallmakeuseoffrequenciesintheISMband.

OneofthewaysBluetoothdevicesavoidinterferingwithothersystemsisbysendingoutveryweaksignalsofabout1milliwatt.Bycomparison,themostpowerfulcellphonescantransmitasignalof3watts.ThelowpowerlimitstherangeofaBluetoothdevicetoabout10meters(32feet),cuttingthechancesofinterferencebetweenyourcomputersystemandyourportabletelephoneortelevision.Evenwiththelowpower,Bluetoothdoesn'trequirelineofsightbetweencommunicatingdevices.Thewallsinyourhousewon'tstopaBluetoothsignal,makingthestandardusefulforcontrollingseveraldevicesindifferentrooms.

Bluetoothcanconnectuptoeightdevicessimultaneously.Withallofthosedevicesinthesame10-meter(32-foot)radius,youmightthinkthey'dinterferewithoneanother,butit'sun-likely.Bluetoothusesatechniquecalledspread-spectrum(扩展频谱)frequencythatmakesitrareformorethanonedevicetobetransmittingonthesamefrequencyatthesametime.Inthistechnique,adevicewilluse79individual,randomlychosenfrequencieswithinadesignatedrange,changingfromonetoanotheronaregularbasis.InthecaseofBluetooth,thetransmitterschangefrequencies1,600timeseverysecond,meaningthatmoredevicescanmakefulluseofalimitedsliceoftheradiospectrum.SinceeveryBluetoothtransmitterusesspread-spectrumtransmittingautomatically,it'sunlikelythattwotransmitterswillbeonthesamefrequencyatthesametime.ThissametechniqueminimizestheriskthatportablephonesorbabymonitorswilldisruptBluetoothdevices,sinceanyinterferenceonaparticularfrequencywilllastonlyatinyfractionofasecond.

Piconets(个人域网络)

Let'ssayyouhaveatypicalmodernlivingroomwiththetypicalmodernstuffinside.There'sanentertainmentsystemwithastereo,aDVDplayer,asatelliteTVreceiverandatelevision;there'salsoacordlesstelephoneandapersonalcomputer.EachofthesesystemsusesBluetooth,andeachformsitsownpiconettotalkbetweenthemainunitandperipheral(外围设备).

ThecordlesstelephonehasoneBluetoothtransmitterinthebaseandanotherinthehandset.Themanufacturerhasprogrammedeachunitwithanaddressthatfallsintoarangeofad-dressesithasestablishedforaparticulartypeofdevice.Whenthebaseisfirstturnedon,itsendsradiosignalsaskingforaresponsefromanyunitswithanaddressinaparticularrange.Sincethehandsethasanaddressintherange,itresponds,andatinynetworkisformed.Now,evenifoneofthesedevicesshouldreceiveasignal

A.YB.NC.NG

6.Ifyonwanttoanswerthe12questionshonestly,youshouldknowwhatmakesyounotblindlyblameyourdepartmentfor______.

7.SomepeoplethoughtthatNASAactedouttheApolloprograminmoviestudiospartiallybecausethepicturestransmittedfromthemoondonotinclude______.

8.EMERYTOBIN:Pistol-Packin'Reformer

Ketchikanhashadmanynotablecitizensinthecity's102yearsofhistory,butperhapsnonestandsoutsoboldlyasthelateEmeryTobin,whodiedin1977atage81.HisrosterofactivitiesandaccomplishmentsinKetchikanislengthyandincrediblyvaried.HejoinedthenewlyfoundedAmericanLegionPost3in1921,becameamemberoftheChamberofCommercein1923,andwasachartermemberofKetchikanRotaryin1925.

Intheearly1920shealsowasanactiveleaderinKetchikan'sBoyScoutTroop#1,thefirsttroopinallofAlaska,antihewasavolunteerdramacoachforthehighschool'stheatricalproductions.HewaslaterafounderpluspublisherandeditoroftheAlaskaSportsmanmagazine,whichcontinuestodayasthenationallyknownAlaskaMagazine.

HismagazineofficeandhisAlaskaSpecialtiesnoveltyshopwerelocatedintheold1904YateshospitalonMissionStreet-nowtheSeamen'sCenter.

TheRainGaugethatstandsnexttotoday'svisitorbureauonthedockwasfirsterectedinfrontofTobin'sshop.HewasanavidboosteroftourismandsoldAlaskabooksandnoveltiesthroughadsinhisAlaskaSportsmanmagazine.

ButthosethingsarenotnecessarilywhatEmeryTobinisrememberedfor.Emery'sclaimtofameisthatheissaidtobethemanwhospearheadedtheclosureofthecity'sredlightdistrictsin1953,ending50yearsofopenlytoleratedprostitutioninKetchikan,Alaska!Hebecameaherotosomeandanarchvillaintoothers.ItwasduringthatcontentiouscrusadethatEmerykeptapistolathandonhisdesk.

AlthoughheservedinFranceinWorldWarⅠ,Emerywasnotamanonewouldeverconnectwithafirearm.Hewasnottall,hebadaratherhighvoiceandaBostonareaaccentheneverlost,whichmadeanRsoundlikeaW—somepeoplethoughtitwasalisp.Hespokerapidlyandwithgreatassurance.Evenafterhishairturnedwhite,hestillhadthickblackeyebrowsonabrowridgethatmadesmilesthatblossomedonhisfaceseemclosertofrowns.WhenhewalkedwithhisrapidgaitdownKetchikan'swetandbreezystreets,headbentandhandsinpockets,heappearedtobebuckingapowerfulheadwind.

EvenintohissixtiesEmerywasfearless.WhenayoungmanshopliftedsomethinganddepartedrunningfromEmery'sAlaskaSpecialtiesshoponMissionStreet,Emerytookoffafterhim,legsandarmspumping.HetackledthemiscreanttothewetsidewalkinfrontoftheentrancetoSt.John'sChurchandpinnedhimthereuntilhelparrived.SomeofEmeryTobin'sspiritanddeterminationmusthavecomedirectlyfromhisfather.

EmeryFridolfTobinwasborntoAugustandEmmaTobin,Swedishimmigrants,onDec.14,1895,inQuincy,Mass.,tenmilessouthofBoston.AugustTobinwasapaintingcontractor,workingfortheschooldistrict.ThegreatDepressionof1893hadaffectedeveryone.Tobin'scustomersownedhimmoneyandTobinowedmoneytohisowncreditors.Timeswerehard.

TwoyearsafterEmery'sbirth,in1897,newsoftheKlondikeGoldRushcircledtheglobe,andamongthoseinfectedwithgoldfeverwereAugustTobinandhisbrother-in-law-Emma'sbrother.Thetwocoupleswerecloseandhadbeenmarriedatadoublewedding.Eachlittlefamilyhadtwochildren-theeldestofthefourbabiesnotyettwoyearsold.Thetwofathersdecidedthatonewouldhavetostayandcareforbothwivesandallfourchildren;theotherwouldgotoAlaska,makeafortuneandreturninayeartoQuincy.Atleastthatwastheplan.SothemendrewstrawsandAugustdrewthelongstrawforAlaska.Emerylovedtotellthisstory.Hewouldleanbackinhissqueakyoakdeskchairandhisfacewasallsmilesasherelatedhisfamily'shistory.

Emery'slatherwaslongonconfidencebutshortonmoneytogethimselftoSeattle,muchlessallthewayto

A.YB.NC.NG

9.

Stranglersaresocalledbecausethey______byblockingthesunlightandcompetingforthenutrients.

10.

ComparedwiththeirdisplacedcounterpartsinPeru,thesituationoftheinternallydisplacedpersonsinColombiais______.

11.

AccordingtoEkman,thefurrowednosemostprobablymeans______.

12.

Iftheagesofthesiblingsarecloser,theyoungeronesintendtoresistthehabitsintroducedbytheolderones.

A.YB.NC.NG

13.

IntheU.S.,theamountofindoorwaterusesurpassestheamountofoutdoorwateruse.

A.YB.NC.NG

14.

AccordingtoHawkins,computerswillfadetothebackgroundbecausecellphonesare______devices.

15.

Inthispassage,theauthorprovidesuswitheffectivewaystocopewithdifferenttypesoflies.

A.YB.NC.NG

16.

Ofallpeoplearoundtheworld,competitivenessisprizedhighestby______.

17.

Theincreasinglengthofnightisthemoststablefactoramongalltheenvironmentalinfluencesonleaveschange.

A.YB.NC.NG

18.

Tospacebiologists,thetropicsareeithercradlesofdiversityor______.

19.

WidelyusingPrEPsmaycausepotentialproblemslikeethicalissuesand________________.

20.

Thosewho______atpartiesnotonlyspoiltheirimagebuttheirdrunkenbehavior.couldendangerthesafetyoftheirownaswellasothers'.

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

Directions:Inthissection,youwillhear8shortconversationsand2longconversations.Attheendofeachconversation,oneormorequestionswillbeaskedaboutwhatwassaid.Boththeconversationandthequestionswillbespokenonlyonce.Aftereachquestiontherewillbeapause.Duringthepause,youmustreadthefourchoicesmarkedA,B,CandD,anddecidewhichisthebestanswer.

(12)

A.Shedoesn'twanttogooutwiththeman.

B.Shewillgoiftheysharetheexpenseforthedinner.

C.Shecan'tgobecauseshewillgoabroadtonight.

D.Sheasksthemantogoabroadwithher.

22.听力原文：M:Andnow,Mrs.Smith,canyoutelluswhathappenedatyourapartmentwhentheearthquakeended?

W:Oh,itwasterrible.I'llneverforgetit.Well,JackandIalwaysgetupataboutaquartertofive.Hehastoworkearly.Yousee,whileIwasinthekitchenpreparingbreakfast,thequakecame.Therewasthishorriblesoundandthefloorwasjustbouncingandrollinglikewave,allatthesametime.

M:Thenwhatdidyoudo?

W:Well,wefigureoutitwasanearthquake.ThenIcrawledunderthetable,andIshoutedatJacktocome.Buthejuststoodthere.

M:Whoa!

W:Itlasted24seconds,andthenitstopped.AndJackandIcouldhearpeopletalkingoutside,sowetriedtogoouttothefrontdoor,butitwasjammedshut.Andthenthefirstaftershockhit.

M:That'sincredible.Thenwhatdidyouguysdo?

W:Well,Irememberthatsomeoneshouted,"Getoutofthere,quickly!"Jacksaid:"Well,gooutofthewindow."ButIcalledout:"It'stoohighup,"becausewewerelivingonthesecondfloor."Notanymore,"Jackshoutedback.So,welookedoutofthewindowand,sureenough,weweredownontheground!

M:Yoursecondfloorapartmentwasontheground?

W:Wecouldn'tbelieveit.Weopenedthewindowandcrawledout.Onceweweredownsafely,weturnedaroundandlookedbackatourapartmentbuilding.Thewholefirstwasgone--itwasjusttotallyflattened.

M:Mrs.Smith.Doyoumeanthatthewholefirstfloorwasgone?

W:Yes,thefirstfloorwasgone.

M:Andwhataboutyourapartment?

W:Theapartment--canyoubelieveit?Hadmovedandstoodthere.

M:Incredible,Mrs.Smith,absolutelyincredible.

(23)

A.5:15.B.4:45.C.5:45.D.4:15.

23.听力原文：W:Hi,Morris.Anylucktoday?

M:No,nothing.I'vetriedtheshops,thesupermarketsandtherestaurants,butnoluckforme.Ihopemylastchancewilllieinthosecabcompanies.

Q:Whathasthemanbeendoing?

(13)

A.Hehasbeenshoppingaround.

B.Hehasbeenlookingforajob.

C.Hehasbeendininginarestaurant.

D.Hehasbeendrivingthecab.

24.(30)

A.Iftheydon'tinvolveanyrisks.

B.Iftheyproducepredictablesideeffects.

C.Whentheurgentneedforthemarises.

D.Whentestsshowthattheyarerelativelysafe.

25.(31)

A.Henryfooledthemanintobringingthebookstohishouse.

B.Henryboughtthemfromthefirstvisitor.

C.ThepolicefoundthemandgavethemtoHenry.

D.Henrygotthembackwiththehelpofthepolice.

26.

【B4】

27.(34)

A.TheoneinAlaska

B.TheoneinAlabama.

C.TheoneinSanFrancisco

D.TheoneinLosAngeles.

28.(25)

A.Graduateschoolapplicationprocedures.

B.Fundingforuniversityeducation.

C.Winningtheconfidenceofvoters.

D.Preparingforanimportanttest.

29.

【B10】

30.听力原文：AbrahamLincolnwasborninalongcabininKentuckyonFebruary12,1809.Whenhewasasmallboy,hisfamilymovedtothefrontierofIndiana.Here,hismothertaughthimtoreadandwrite.Lincolnhadverylittleformaleducation,buthebecameoneofthebest-educatedmenoftheGreatWest.

WhenLincolnwasayoungman,hisfamilymovedtothenewstateofIllinois.Lincolnhadtoearnalivingatanearlyage,butinhisleisuretimehestudiedlaw.HesoonbecameoneofthebestknownlawyersinthestatecapitalatSpringfield,Illinois.ItwasherethatLincolnbecamefamousforhisdebateswithStephenA.Douglasonthesubjectofslavery.

In1860,LincolnwaselectedPresidentoftheUnitedStates.HewasthecandidateofthenewRepublicanParty.Thispartyopposedthecreationofnewslavestates.Soonofterhiselection,someofthesouthernstateswithdrewfromtheUnionandsetuptheConfederateStatesofAmerica.ThisactionbroughtontheterribleCivilWar,whichlastedfrom1861to1865.

OnJanuary1,1863,duringthewar,LincolnissuedhisfamousEmancipationProclamation.InthisdocumentLincolnproclaimedthatalltheslavesinthesecedingstatesweretobefreeofthatdate.In1865,afterthewarended,theThirteenAmendmentwasaddedtotheConstitutionoftheUnitedStates.ThisamendmentputanendtoslaveryeverywhereintheUnitedStates.

Earlyin1865,theCivilWarcametoanendwiththedefeatoftheSouthbytheNorth.Onlyafewdaysaftertheendofthewar,LincolnwasshotbyanactornamedJohn.WilesBooth.ThePresidentdiedonApril14,1865.Inhisdeath,theworldlostoneofthegreatestmenofalltime.

(33)

A.In1809.B.In1863.C.In1865.D.In1860.

31.

【B2】

32.(39)

33.(36)

A.Thefivequestionswerenotwelldesigned.

B.Notallthequestionnaireswerereturned.

C.Onlyasmallnumberofstudentsweresurveyed.

D.Someoftheanswerstothequestionnairewerenotvalid.

34.(29)

A.TheBattleinSouthCarolina.

B.TheBattleinnorthernPennsylvania.

C.TheBattleinGettysburg.

D.TheBattleinNorthCarolina.

35.

【B6】

36.(22)

A.Usethemedialikeinternetandconference.

B.Treatthecustomersaswellastheboss.

C.Putsomepersonalinsightintothebrand.

D.Differentiatethebrand.

37.(16)

A.Sheisstubborn.

B.Sheislonely.

C.Sheisnoteasy-going.

D.Sheishopeless.

38.听力原文：M:I'vejustfoundthemostusefuldeviceatthatnewoutdoorstore,awaterpurifier.

W:Awaterpurifier!Youwanttocarryevenmoreequipmentwithyouonourhikingtrips?

M:Ifitislightweightandsaveswork--yes!Andthisonefitsthatdescription.

W:Really?Ibetittakesupalotofroom.

M:Notatall.It'sastraw,muchliketheonesyouusetodrinkasodaoramilkshake.

W:Really?That'ssmall.

M:It'splasticandhasaseriesofmineralandchemicalfiltersthatstrainharmfulmicrobesfromwater.

W:Yes,buthowgoodajobcanitdofilteringthegermsoutofstagnantpondwater,orwaterfromlakesandstreams?

M:It'sfantastic.Itmakesthewaterentirelygerm-free.

W:Butwhataboutsaltorchemicalpollutants?Doesitcleanthemout?

M:No,itdoesn'tremovesaltandchemicals.Butthesearereallynotmajorconcernswhenwe'reouthikingandcamping.

W:Hm...Howlongwillastrawlast?

M:Forabout100gallons.Butdon'tworryaboutmeasuringthatlargeamountofwater.Thereisabuilt-insafetyfeature.Themineralandchemicalfiltersbecomecloggedlongbeforethelimitisreached,andthestrawthenstopsdrawingwater.

W:IthinkI'llgoandgetoneformycampingtripthisweekend.

(20)

A.Smallandlightweight.

B.Solidandheavy.

C.Bulkybutweightless.

D.Largebutnecessary.

39.听力原文：M:Thebellwillringintwominutes,butI'dliketogetsomethingtodrinkbeforethelecturebegins.

W:Shallwetakeourseatsnow?Youcangetsomelater.

Q:Whatdoesthewomansuggestthattheyshoulddo?

(17)

A.Waitforthelecturetobegin.

B.Goimmediatelytotheirseats.

C.Getsomethingtodrinkfirst.

D.Sitdownandenjoythelecture.

40.(21)

A.Salt.B.Chemicalpollutants.C.Germs.D.Minerals.

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

Theauthorseemstobelievethatevenintheabsenceofcreditcards,somepeoplewouldundoubtedly______.

42.SectionA

Directions:Inthissection,thereisashortpassagewith5questionsorincompletestatements.Readthepassagecarefully.Thenanswerthequestionsorcompletethestatementsinthefewestpossiblewords.

Thediscoverythatlanguagecanbeabarriertocommunicationisquicklymadebyallwhotravel,study,governorsell.Whethertheactivityistourism,research,government,policing,businessordatadissemination,thelackofacommonlanguagecanseverelyimpedeprogressorcanhaltitaltogether.

Althoughcommunicationproblemsofthiskindmusthappenthousandsoftimeseachday,veryfewbecomepublicknowledge.Publicitycomesonlywhenafailuretocommunicatehasmajorconsequences,suchasstrikes,lostorders,legalproblemsorfatalaccidents--even,attimes,war.Onereportedinstanceofcommunicationfailuretookplacein1970,whenseveralAmericansateaspeciesofpoisonousmushroom.Noremedywasknown,andtwoofthepeoplediedwithindays.Aradioreportofthecasewasheardbyachemistwhoknewofatreatmentthathadbeensuccessfullyusedin1959andpublishedin1963.WhyhadtheAmericandoctorsnotheardofitsevenyearslater?PresumablybecausethereportofthetreatmenthadbeenpublishedonlyinjournalswritteninEuropeanlanguagesotherthanEnglish.

Severalcomparablecaseshavebeenreported.Butisolatedexamplesdonotgiveanimpressionofthesizeoftheproblem--somethingthatcancomeonlyfromstudiesoftheuseoravoidanceofforeign-languagematerialsandcontactsindifferentcommunicativesituations.IntheEnglish-speakingscientificworld,forexample,surveysofbooksanddocumentsconsultedinlibrariesandotherinformationagencieshaveshownthatverylittleforeign-languagematerialiseverconsulted.Libraryrequestsinthefieldofscienceandtechnologyshowedthatonly13percentwereforforeignlanguageperiodicals.

Thelanguagebarrierpresentsitselfinstarkform.tofirmswhowishtomarkettheirproductsinothercountries.Britishindustry,inparticular,hasinrecentdecadesoftenbeencriticizedforitslinguisticinsularityforitsassumptionthatforeignbuyerswillbehappytocommunicateinEnglish,andthatawarenessofotherlanguagesisnotthereforespriority.Inthe1960s,overtwo-thirdsofBritishfirmsdealingwithnon-English-speakingcustomerswereusingEnglishforoutgoingcorrespondence;manyhadtheirsalesliteratureonlyinEnglish;andasmanyas40percentemployedno-oneabletocommunicateinthecustomer'slanguages.AsimilarproblemwasidentifiedinotherEnglish-speakingcountries,notablytheUSA,AustraliaandNewZealand.Andnon-Englishspeakingcountrieswerebynomeansexempt--althoughthewidespreaduseofEnglishasanalternativelanguagemadethemlessopentothechargeofinsularity.

Thecriticismandpublicitygiventothisproblemsincethe1960sseemstohavegreatlyimprovedthesituation.Industrialtrainingschemeshavepromotedanincreaseinlinguisticandculturalawareness.Manyfirmsnowhavetheirowntranslationservices.Somefirmsrunpart-timelanguagecoursesinthelanguagesofthecountrieswithwhichtheyaremostinvolved;someproducetheirowntechnicalglossaries,toensureconsistencywhenmaterialisbeingtranslated.Itisnowmuchmorereadilyappreciatedthatmarketingeffortscanbedelayed,damagedordisruptedbyafailuretotakeaccountofthelinguisticneedsofthecustomer.

Languageproblemsmaycometotheattentionofthepublicwhentheyhave______suchasfatalaccidentsorsocialproblems.

43.Fromthepassage,itcanbeinferredthat______.

A.rewardsarehighlyeffectiveinAmerica

B.rewardsarenotmuchsought-afterinacademiccircles

C.rewardshavelonglosttheirappealinAmericansociety

D.Americansareaddictedtorewards

44.Thewordscienceisheardsoofteninmoderntimesthatalmosteverybodyhassomenotionofitsmeaning.Ontheotherhand,itsdefinitionisdifficultformanypeople.Themeaningofthetermisconfused,buteveryoneshouldunderstanditsmeaningandobjectives.Justtomaketheexplanationassimpleaspossiblesupposescienceisdefinedasclassifiedknowledge(facts).

Eveninthetruesciencesdistinguishingfactfromfictionisnotalwayseasy.Forthisreasongreatcareshouldbetakentodistinguishbetweenbeliefsandtruths.Thereisnodangeraslongasacleardifferenceismadebetweentemporaryandprovedexplanations.Forexample,hypothesesandtheoriesareattemptstoexplainnaturalphenomena.Fromthesepositionsthescientist

continuestoexperimentandobserveuntiltheyareprovedordiscredited(使不相信).Theexactstatusofanyexplanationshouldbeclearlylabeledtoavoidconfusion.

Theobjectivesofscienceareprimarilythediscoveryandthesubsequentunderstandingoftheunknown.Mancannotbesatisfiedwithrecognizingthatsecretsexistinnatureorthatquestionsareunanswerable;hemustsolvethem.Towardthatendspecialistsinthefieldofbiologyandrelatedfieldsofinterestaredirectingmuchoftheirtimeandenergy.

Actually,twobasicapproachesleadtothediscoveryofnewinformation.One,aimedatsatisfyingcuriosity,isreferredtoaspurescience.Theotherisaimedatusingknowledgeforspecificpurposes—forinstance,improvinghealth,raisingstandardsofliving,orcreatingnewconsumerproducts.Inthiscaseknowledgeisputtoeconomicuse.Suchanapproachisreferredtoasappliedscience.

Sometimespractical-mindedpeoplemissthepointofpurescienceinthinkingonlyofitsimmediateapplicationforeconomicrewards.Chemistsresponsibleformanyofthediscoveriescouldhardlyhaveanticipatedthattheirfindingswouldonedayresultinapplicationsofsuchapracticalnatureasthosedirectlyrelatedtolifeanddeath.Thediscoveryofonebitofinformationopensthedoortothediscoveryofanother.Somediscoveriesseemsosimplethatoneisamazedtheywerenotmadeyearsago;however,oneshouldrememberthattheconstructionofthemicroscopehadtoprecedethediscoveryofthecell.Thehostofscientistsdedicatingtheirlivestopuresciencearenotapologeticaboutignoringthepracticalsideoftheirdiscoveries;theyknowfromexperiencethatmostknowledgeiseventuallyapplied.

Todefinesciencewemaysimplycallit______.

A.classifiedknowledge

B.thestudyofunrelatedfields

C.thestudyofunrelatedsubjects

D.anattempttoexplainnaturalphenomena

45.

Accordingtothepassage,

A.theproblemofstudentcheatinghasitsrootsindeeperproblems

B.studentsdonotcheatonessaytests

C.achangeintheeducationalsystemwilleliminatetheneedtocheat

D.punishmentisaneffectivemethodofstoppingcheating

46.

WhichofthefollowingaboutnewspaperadsisNOTtrue?

A.Newspaperadstellpeoplesalesinformation.

B.Newspaperadscanmakeaproductfamous.

C.Localbusinessprefersnewspaperads.

D.Newspaperadsattractcustomermost.

47.SectionB

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

Mountingevidencehasledastronomerstojustsuchanimprobableconclusion,atleast90percentandpossibly99percentofallmatterintheuniverseiscompletelyinvisible.Astronomerscallthisinvisiblestuffdarkmatter.

Anastronomerfirstreportedtheinvisiblematterafternotingsomeunusualbehavior.invisiblematter.In1993,SwissastrophysicistFritzZwickyobservedthatgalaxiesinaclusterofgalaxiestravelledathigherspeedsthanexpected.Heconcludedthatsomethingwascausingstrangegravitationaleffectsonthesegalaxies.

Galaxiesarelikevastislandsindeepspacecontainingbillionsofstarsthatareheldtogetherbytheforceofgravity.Somegalaxiesarepartoflargersystemscalledclusters,whichcontainmanygalaxies.Mostgalaxies,however,belongtosmallersystemscalledgroups.Groupsandclustersinturnform.evenlargerstructuresknownassuperclusters.Justastheforceofgravitykeepsstarstogetheringalaxies,sotheforceofgravityappearstokeepgalaxiestogetherinclusters.

Thissameforceofgravitykeepsplanetsorbitingaroundthesun,ratherthanflyingoffintospace.Howgreataforcegravityexertsdependsonthemassoftheobjectsattractedandthedistancebetweenthem,aprinciplediscoveredbyNewton.Theamountofmassandthedistancebetweenobjectsalsodeterminehowfasttheobjectstravelastheyorbiteachother.Forexample,inoursolarsystem,thesunisthemostmassiveobject,makingupabout99.9percentofthemassofthesolarsystem,andtheforceofitsgravitykeepsEarthandtheotherplanetsinorbitaroundit.Theorbitalspeedsoftheplanetsdeclinewithincreasingdistancefromthesun.Theplanetnearesttothesun,Mercury,travelsatanorbitalspeedof48kilometerspersecond,whilethedistantplanetPlutoorbitsatspeedof4.7kilometerspersecond