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英语专业八级考试模拟题5(1)PARTILISTENINGCOMPREHENSIONInSectionA,BandCyouwillheareverythingONLYONCE.Listencarefullyandthenanswerthequestionsthatfollow.MarkthecorrectresponsetoeachquestionontheColoredAnswerSheet.SECTIONA

TALKQuestion1to5refertothetalkinthissection.Attheendofthetalkyouwillbegiven15secondstoanswereachofthefollowingfivequestions.Nowlistentothetalk.1."____haditnotforthecourageofaminorchieftain____"means____A)thankstoB)inspiteofC)butforD)becauseof2.Shakawasinhumanbecause____A)hemadehimselfKingoftheZulusB)hegavespecialprivilegestohisbodyguardC)hesetstandardshecouldnotkeephimselfD)hehadnorespectforhumanlife3."Allthosewhohadfailedtobepresentatthefuneral____"means____.A)allwhohadnotcomeB)allwhohadnotbeenabletocomeC)allwhohadnotbroughtpresentsD)allwhohadnotannouncedtheirarrival4.Shaka'sorderswere"littlelessthanasentenceofnationalstarvationbecause____.A)theZuluswerenotlazytocultivateanythingbutgrainB)theZuluswerealreadyonadietC)theZulus'foodconsistedmainlyofgrainandmilkproducts.D)theZulushadnothingelsetoeat5.TochallengetheKing'swishesatsuchamomentwas____.A)towanttodieatonceB)tobegtobekilledatonceC)toruntheriskofbeingkilledonthespotD)toaskforaquickandpainlessdeathSECTIONBINTERVIEWQuestion6to10arebasedonaninterview.Attheendoftheinterviewyouwillbegiven15secondstoanswereachofthefollowingquestion.Nowlistentotheinterview.6.Aparticularwaytodealwithaggressivechildrenisto____.A)givethemseverepunishmentB)tellthemtobehavethemselvesC)organizethemtofightD)sendsomeofthemtoprison7.Theboxingcompetitionwasto____.A)trainthemtobeprofessionalboxersB)teachthemtofollowrulesC)givethemsomephysicalexerciseD)cultivatetheirsenseofcompetition8.Whatdidoneoftheboysdo?A)Hekilledhiscat.B)Hecutoffhisdog'sears.C)Hehurtanotherboy.D)Heblindedhiscat.9.Somechildrenareaggressivebecause____.A)theyarefromverypoorfamiliesB)theirparentsareusuallyaggressiveC)theywanttoshowtheyarestrongD)theyarelongingforattention10.Inthisspecialschool,thereareusually____childreninaclass.A)5or6B)30or40C)7to10D)13to14SECTIONDNOTE-TAKINGANDGAP-FILLINGInthissectionyouwillhearamini-lecture.YouwillhearthelectureONLYONCE.Whilelisteningtothelecture,takenotesontheimportantpoints.Yournoteswillnotbemarked,butyouwillneedthemtocompletea15-minutegap-fillingtaskonANSWERSHEETONEaftertheminilecture.Usetheblanksheetfornote-taking.ANSWERSHEETONEFillineachofthegapswithONEsuitableword.Youmayrefertoyournotes.Makesurethewordyoufillinisbothgrammaticallyandsemanticallyacceptable.SportsInBritainThereare3major(16)sportsinGreatBritain.Theyare

football,Cricket,andRugby.Football,orsoccer,isthemostpopular.FootballmatchesareshownontheBBCon(17)eveningsaround10oclock.Somefootballgroundswillhavecrowdsmorethan(18).Professionalteamsareorganizedintofour(19)inEngland

and2inScotland.Attheendoftheseason,someteamsare(20),andsomeare(21)Recently,someclubsarealways

in(22)trouble.Rugbywasfirstplayedatafamouspublicschoolcalled(23).RugbyisplayedalloverBritain.Ithasbeendescribedas"agamedesignedforhooligansbutplayedbygentlemen".Cricketseemsmorepeacefulandisplayedin(24).Someofthecountriesofthe(25)sendnationalteamstoplayeachother.ThisiscalledATestMatch,whichcangoonfor5days.PARTIIPROOFREADING&ERRORCORRECTIONThefollowingpassagecontainstenerrors.Eachlinecontainsamaximumofoneerror.Ineachcaseonlyonewordisinvolved.Youshouldproofreadthepassageandcorrectitinthefollowingway:Forawrongword,underlinethewrongwordandwritethecorrectoneintheblankprovidedattheendoftheline.Foramissingword,markthepositionofthemissingwordwitha"^"sign

andwritethewordyoubelievetobemissingintheblankprovidedattheend

oftheline.Foranunnecessaryword,

crosstheunnecessarywordwithaslash"/"andputthewordintheblankprovidedattheendoftheline.Thetelephonesystemisacircuit-switchednetwork.Formuchofthehistoryofthesystem,whenyouplaced(26)acall,youwererentingapairofcopperwiresthatrancontinuouslyfromyourtelephonetotheotherpartysphone.Youhadexcludinguseofthosewiresduringthe(27)call;whenyouhungup,theywererentedtosomeoneelse.Todaythetransactionismorecomplicated.(yourcallmaywellpossessafiber-opticcableorasatellitewithhundredsofothercalls),butmoreconceptuallythesystem(28)stillworksthesameway.Whenyoudialthephone,yougetaprivateconnectionofoneotherparty.Thisisanalternativenetworkarchitecturecalled(29)packetswitching,inwhichallstationsarealwaysconnectedtothenetwork,buttheyreceiveonlythemessagesaddressedtothem.Itisasifyourtelephonewasalwaystunedinto(30)thousandsofconversationsgoingonthewire,butyou(31)heardonlytheoccasionalwordintendedtoyou.Most(32)computernetworksemploypacketswitching,becauseitismoreefficientthancircuitswitchingwhentrafficisheavy.Itseemsreasonabletheexistingpacket-switched(33)networkwillgrow,andnewonemaybecreated;theycould(34)wellabsorbtrafficthatwouldotherwisegotothetelephonesystemandtherebyreducetheneedfortelephonenumbers.PARTIIIREADINGCOMPREHENSIONSInthissectiontherearefourreadingpassagesfollowedbyfifteenmultiple-choicequestions.ReadthepassagesandthenmarkyouranswersonyourAnswerSheet.TEXTATheHouseofLordshasacharmfewpeopleseemabletoresist.Themorecut-offitbecomesfromeverydaylife,thegreateritsattractionforwearybusinessmenandpoliticians.Ontheroadoutsidetheword"Peers"ispaintedacrossthecar-parkinlargewhiteletters.Insideatallex-Guardsmandirectsyouthroughthevaultedentrancehall,pastalongrowofelaborategothiccoat-hooks,eachonelabeled,beginningwiththeroyaldukes——oneofthemanyfeaturesofthebuildingreminiscentofaschool.Upstairsyoucometoaseriesofhigh,darkrooms,withgothicwoodworkandcarvedceilings.Alife-sizewhitemarblestatueoftheyoungQueenVictoriawatcheselderlypeerssittingattableswritinglettersongothicwritingpaper.Doorsleadofftolongdining-rooms,oneforguests,anotherforpeersonlyandtoalargebarlookingovertheriver,whichservesdrinksalldayandsellsspecial"HouseofLords"cigarettes.Othercloseddoorsaresimplymarked"Peers"——anembarrassingambiguityforladypeers,for"peers"canmeantheLordsequivalentof"gentle-men".Thereisanatmosphereofcontentedoldage.Theroomsarefullofhalf-rememberedfacesoffamousmenorpoliticiansonehad——howshalloneputit——forgottenwerestillaround.Thereisbanterbetweenleft-wingpeersandright-wingpeersandagreatdealoftalkaboutoperationsandailmentsandnursinghomes.Leadingoffthemanante-roomisthechamberitself——thefinefloweroftheVictorianromanticstyle.Itissmall,onlyeightyfeetlong.Stainedglasswindowsshedadarkredlight,androwsofstatueslookdownfromthewalls.Oneithersidearelongred-leathersofaswithdarkwoodenchoirstallsattheback.Betweenthetwosidesis"theWoolsack",thetraditionalseatoftheLordChancellor,stuffedwithbitsofwoolfromallovertheCommonwealth.Atthefarendisanimmensegoldcanopy,withtwenty-foothighcandlesticksinthemiddle,thethronefromwhichthemonarchopensParliament.Leaningback,onthesofa,whispering,puttingtheirfeetup,listening,fumblingwithpapers,makingnotesorsimplysleeping,arethepeers.Onafullday,whichisrear,youcanseethemintheirgroups:bishops,judges,industrialpeers.Butusuallythereisonlyahandfulofpeerssittingintheroom,thoughsincepeershavebeenpaidthreeguineasforattending,thereareoftenanaverageof110peersinanafternoon.IntheimposingsurroundingsitissometimesdifficulttorememberhowunimportanttheLordsare.ThemostthattheLordscandonowisdelayabillayear,andany"moneybill"theycandelayforonlyamonth.Theirmainimpactcomesfromthefewinchesofspaceinnextmorningspapers.ThePrimeMinistercancreateasmanypeersashelikesand,thoughtocarryoutthethreatwouldbeembarrassing,thenightmareisrealenoughtobringthepeerstoheel.36.TheauthorfeelsthatHouseofLordsis____A)delightful,butoutoftouchwiththemodernworld.B)remotefromdailylifeandrathertired.C)aplacethatbusinessmenandpoliticianslikerestingin.D)anexcellentrestingplaceforpoliticiansandbusinessmen.37.ManymembersoftheHouseofLordare____A)well-knownpoliticiansandfamousTVpersonalities.B)distinguishedandcelebratedpoliticians.C)notoriousandremarkablemen.D)menwhohavedroppedoutoftheworldinwhichtheybecamewell-know.38.Theonlyrealinfluencethepeershavenowis____A)todelaymoneybillsforoneyeariftheydon'tagreewiththem.B)iftheirspeechesaffectpubicopinionthroughthenewspapers.C)thattheycanmakethePrimeMinisternervousiftheythreatennottoagreetohisbills.D)theycanrefusetoacceptanygovernmentactforoneyear.TEXTBWithitscommoninterestinlawbreakingbutitsimmenserangeofsubject-matterandwidely-varyingmethodoftreatment,thecrimenovelcouldmakealegitimateclaimtoberegardedasaseparatebranchofthetraditionalnovel.Thedetectivestoryisprobablythemostrespectful(atanyinthenarrowsenseofword)ofthecrimespecies.ItscreationisoftentherelaxationofUniversitydons,literaryeconomists,scientistsorevenpoets.Fatalitiesmayoccurmorefrequentlyandmysteriouslythanmightbeexpectedinpolitesociety,isfamiliartous,ifnotfromourownexperience,atleastinthenewspaperorthelivesoffriends.Thecharacters,thoughnormallyrealizedsuperficially,areasrecognizablehumanandconsistentasourlessintimateassociates.Asstorysetinamoreremoteenvironment,AfricanjungleorAustralianbush,ancientChinaorgas-litLondon,appealstoourinterestingeographyorhistory,andmostdetectivestorywritersareconscientiousinprovidingareasonablyauthenticbackground.Theelaborate,carefully-assembleplot,despisedbythemodernintellectualcriticsandcreatorsofsignificantnovels,hasfoundrefugeinthemurdermystery,withitssprinklingofclues,itsspicingwithapparentimpossibilities,allwithappropriatesolutionsandexplanationsattheend.WiththeguiltofescapismfromRealLifenagginggently,wesecretlyrevelintheunmaskingofevilbyavaguelysuper-humansleuth,whoseesthroughanddispelsthecloudofsuspicionwhichhashoveredsounjustlyovertheinnocent.Thoughitsvillainalsoreceiveshisrightfuldeserts,thethrillerpresentsalesscomfortableandcredibleworld.Thesequenceoffistfights,revolverduels,carcrashesandescapedfromgas-filledcellarsexhauststhereaderfarmorethanthanthehero,who,sufferingfromatleasttwobrokenribs,oneblackeye,uncountablebruisesandahangover,canstillchaseandoverpoweranarmedvillainwiththephysiqueofawrestler.Hemovesdangerouslythroughaworldofruthlessgangs,brutality,aviciouslustforpowerandmoneyand,incontrasttothedetectivetale,withanear-omniscientarch-criminalwhosedefeatseemsalmostaccidental.Perhapswemissinthethrillerthesecurityofbeingsafelyledbyourimperturbableinvestigatorpastascoreofredherringsandblindavenuestoafinalgatheringofsuspectswhenanunchallengeableelucidationofallthathasbewilderedusisgivenjusticeandgoodnessprevail.Allthatwevainlyhopeforfromlifeisgrantedvicariously.39.Thecrimenovelmayberegardedas____A)anotquiterespectableformoftheconventionalnovel.B)notatruenovelatall.C)relatedinsomewaystothehistoricalnovel.D)anindependentdevelopmentofthenovel.40.Thepassagesuggeststhatintellectualswritedetectivestoriesbecause____A)thestoriesareofteninfactveryinstructiveB)theyenjoywritingthesestories.C)thecreationofthesestoriesdemandsconsiderableintelligence.D)detectivestoriesareanacceptedbranchofliterature.41.Whichofthefollowingismentionedinthepassageasoneofthesimilaritiesbetweenthedetectivestoryandthethriller?A)bothhaveinvolvedplots.B)botharecondemnedbymoderncritics.C)bothareformsofescapistfiction.D)bothdemonstratethetriumphofrightoverwrong.42.Inwhatwayarethedetectivestoryandthethrillerunlike?A)inintroducingviolenceB)inprovidingexcitementandsuspenseC)inappealingtotheintellectualcuriosityofthereadersD)inensuringthateverythingcomestightintheend.TEXTCInmostofthehumancivilizationofwhichwehaveanyproperrecords,youthhasdrawnoneitherartorlifeformodels,planningtoemulatetheheroesdepictedinepicsontheshadow——playscreenorthestage,orthoseknownhumanbeings,fathersorgrandfathers,chiefsorcraftsmen,whoseeverycharacteristiccanbestudiedandimitated.Asrecentlyas1910,thiswastheprevailingconditionintheUnitedStates.Ifhecamefromanon-literatebackground,therecentimmigrantlearnedtospeak,move,andthinklikeanAmericanbyusinghiseyesandearsonthelaborlineandinthehomesofmoreacculturatedcousins,bywatchingschoolchildren,orbyabsorbingthestandardsoftheteacher,theforeman,theclerkwhoservedhiminthestore.Fortheliterateandtheliteratechildrenofthenon-literate,therewasart——thestoryofthefrustratedartistintheprairietownofthesecondgenerationbattlingwiththelimitationsofthefirst.Andatasimplerlevel,thereweretheWesternandHollywoodfairytaleswhichpointedamoralbutdidnot,asarule,reachtablemanners.WiththedevelopmentofthecountermovementagainstHollywood,withtheefflorescenceofphotography,withTime-Life-Fortunetypesofreportingandthedead-panNewYorkmannerofdescribingthelifeofanold-clothesdealerinaforgottenstreetorofpresentingthe"accurate","checked"detailsofthelivesofpeoplewhoseeminencegaveatleastasortoflicensetoattackthem,withthepassionfor"humandocuments"inDepressiondays——anecessarysubstituteforproletarianartamongmiddle-classwriterswhoknewnothingaboutproletarians,andmiddle-classreaderswhoneededtheshockofverisimilitude——anewerainAmericanlifewasusheredin.Itwastheerainwhichyoungpeopleimitatedneitherlifenorartnorfairytale,butinsteadwerepresentedwithmodelsdrawnfromlifewithminimalbutcrucialdistortions.Doctoredlifehistories,posedcarelessness,"candid"shotsofpeopleintheirownhomeswhichtookhourstoarrange,picturesshotfromreallifetoscriptwrittenmonthsbeforesupplementedbynationalpollsandsurveyswhichassuredthereaderthatthishobbysocksdidindeedrepresentanationalnormoragrowingtrend——replacedtheoldermodels.43.Thisarticleisbasedontheideathat____A)peopletodaydonotlookformodelstoimitate.B)whomweemulateisnotimportant.C)peoplegenerallypatterntheirlivesaftermodels.D)heroesarepassed.44.Storiesofthesecondgenerationbattlingagainstthelimitationofthefirstwereoftenresponsiblefor____A)inspiringliterateimmigrants.B)frustratingeducatedimmigrants.C)preventingtheassimilationofimmigrants.D)instillingintoimmigrantsanantagonisticattitudetowardtheirforebears.45.ThecountermovementagainstHollywoodwasamovement____A)towardfantasy.B)againsttheteachingsofmorals.C)towardsrealism.D)awayfromrealism.46.Theauthorattributethechangeinattitudesince1920to____A)alogicalevolutionofideas.B)widespreadofmoraldecay.C)theinfluenceofthepress.D)aphilosophyofplenty.TEXTDDuringtheholidayIreceivednoletterfromMyrtleandwhenIreturnedtothetownshehadgoneaway.Itelephonedeachdayuntilshecameback,andthenshesaidshewasgoingtoaparty.Iputupwithhernewtacticspatiently.Thenexttimewespentaneveningtogethertherewasnoquarrel.ToavoiditItookMyrtletothecinema.WedidnotmentionHaxby.Ontheotherhanditwasimpossibletopretendthateitherofuswashappy.Myrtlesexpressionofunhappinesswasdeepening.DaybydayIwatchedhersinkintoaboutofdespair,andIconcludeditwasmyfault——hadInotconcludeditwasmyfault,thelooksMyrtlegavemewouldrapidlyhaveconcludeditforme.ThetopicofconversationweavoidedaboveallotherswastheprojectofgoingtoAmerica.IcursedthetactlessnessofRobertandTomintalkingaboutitinfrontofherbeforeIhadhadtimetoprepareherforit.Ifeltaggrieved,asonedoesafterdoingwrongandbeingfoundout.Ididnotknowwhattodo.Whenyougotothetheatreyouseeanumberofcharacterscaughtinadramaticsituation.Whathappensnext?Theytheneverythingischanged.MylifeisdifferentIneverhavescenes,andIifIdo,theyarediscouraginglynotdramatic.Practicallynoactionarises.Andnothingwhatsoeverischanged.Mylifeisnotasgoodasaplay.Nothinglikeit.AllIdidwithmypresentsituationwastryandtideitover.WhenMyrtleemergedfromthedeepestblacknessofdespair——nobodyafterall,couldremaintheredefinitely——Itriedtocomforther.Igraduallyunfoldedallmyplan,includingthoseforher.ShecouldcometoAmerica,too.Shewasacommercialartist.Shecouldgetajobandourrelationshipcouldcontinueasitwas.AndIwillnotswearthatIdidnotthink:"AndinAmericashemightevensucceedinmarryingme."Itproducednoeffect.Shebegantodrinkmore.Shebegantogotopartiesveryfrequently;itwasverysoonclearthatshehaddecidedtoseelessofher.IdonotblameMyrtle.HadIbeeninherplaceIwouldhavetriedtodothesamething.BeinginmyplaceItriedtopreventher.Iknewwhatsortofpartiesshewasgoingto:theywerepartiesatwhichHaxbywaspresent.Webegantowrangleovergoingoutwitheachother.ShewasneverfreeatthetimesIsuggested.Sometimes,usuallyonaSaturdaynight,shefirstarrangedtomeetmeandthenchangedhermind.Icalledthatrubbingitinalittletoofar.Butherbehavior,Irepeat,perfectlysensible.Byseeinglessofmeshestoodachanceoffindingsomebodyelse,orofmakingmejealous,orofboth.Eitherwayshecouldnotlose.47.WhenMyrtlewasavoidingtheauthorhe____A)sawthroughherplanandbehavecalmly.B)becameangryandcouldnotputheroutofhismind.C)wasworriedanduncomprehending.D)decidedthathecouldnotbearthewayshetreatedhim.48.Theauthorfeltguiltyandangrybecause____A)hisfriendshaddiscoveredthathehadnottoldMyrtleanything.B)TomandRoberthadtoldMyrtleabouttheirplans.C)MyrtlehadfoundouttheirplanswhenTomandRoberttalked.D)hehadtoldMyrtletheirplansbeforeTomandRobertmentionedthem.49.Theauthorcomplainsthathislifewasnotlikeaplayinwhich____A)thecharacterssolvetheirproblemsbyviolence.B)theviolencethatfollowsactionsolvestheirproblems.C)theactionthatfollowsquarrelssolvestheirproblems.D)thecharacterssolvedtheirproblemsinspiteofviolence.50.TherealreasonwhyMyrtlewasangryandupsetwasthat____A)shehadneverwantedtogotoAmericawiththeauthor.B)theauthorwouldnotagreetotakeherashiswife.C)shedidnotwanthimtogotoAmericawithhisenemies.D)shedidnotwanttobefeltbehindinAmerica.SECTIONBSKIMMINGANDSCANNINGInthissectiontherearesevenpassagefollowedbytenmultiple-choicequestions.SkimorscanthemasrequiredandthenmarkyouranswersonyourAnswerSheet.TEXTEFirstreadthequestion.51.Whatistheauthorsmainpurposeinthepassage?A.topointouttheimportanceofrecentadvancesinarchaeology.B.todescribeanarchaeologistseducation.C.toexplainhowarchaeologyisasourceofhistory.D.toencouragemorepeopletobecomearchaeologist.NowgothoughTextEquicklytoanswerquestion51.Archaeologyisasourceofhistory,notjustahumbleauxiliarydiscipline.Archaeologicaldataarehistoricaldocumentsintheirownright,notmereillustrationstowrittentexts.Justasmuchasanyotherhistorian,anarchaeologiststudiesandtriestoreconstitutetheprocessthathascreatedthehumanworldinwhichwelive——andusourselvesinsofarasweareeachcreaturesofourageandsocialenvironment.Archaeologicaldataareallchangedinthematerialworldresultingfromhumanactionor,moresuccinctly,thefossilizedresultsofhumanbehavior.Thesumtotaloftheseconstitutewhatmaybecalledthearchaeologicalrecord.Thisrecordexhibitscertainpeculiaritiesanddeficienciestheconsequencesofwhichproducearathersuperficialcontrastbetweenarchaeologicalhistoryandthemorefamiliarkindbaseduponwrittenrecords.Notallhumanbehaviorfossilizes.ThewordsIutterandyouhearasvibrationsintheairarecertainlyhumanchangesinthematerialworldanymaybeofgreathistoricalsignificance.YettheyleavenosortoftraceinthearchaeologicalrecordsunlesstheyarecapturedbyaDictaphoneorwrittendownbyaclerk.Themovementoftroopsonthebattlefieldmay"changethecourseofhistory",butthisisequallyephemeralfromthearchaeologistsstandpoint.Whatisperhapsworseisthatmostorganicmaterialsareperishable.Everythingmadeofwood,hide,wool,linen,grass,hair,andsimilarmaterialswilldecayandvanishindustinafewyearsorcenturies,saveunderveryexceptionalconditions.Inarelativelybriefperiodthearchaeologicalrecordisreducedtomerescrapsofstone,bone,glass,metal,andearthenware.Stillmodernbyafewluckyfindsfrompeatbogs,deserts,andfrozensoils,isabletofillupagooddealofthegap.51.Whatistheauthor'smainpurposeinthepassage?A)topointouttheimportanceofrecentadvancesinarchaeology.B)todescribeanarchaeologist'seducation.C)toexplainhowarchaeologyisasourceofhistory.D)toencouragemorepeopletobecomearchaeologist.TEXTFFirstreadthequestions.52.Themainsubjectofthepassageis____A.famousmathematicians.B.mathematicaleducation.C.tilingtheplane.D.irregularpolygons.NowgothroughTEXTFquicklyandanswerquestion52.MarjorieRicewasanunlikecandidatefortheroleofmathematicalinnovator.Shehadnoformaleducationinmathematicssaveasinglecourserequiredforgraduationfromhighschoolin1931.Nonetheless,in1975shetookupaproblemthatprofessionalmathematicianshadtwiceleftfordead,andshowedhowmuchlifewasinitstill.Theproblemwastessellation,ortilingoftheplane,whichinvolvestakingasingleclosedfigure——atriangle,forexample,orarectangle——andkittingittogetherwithcopiesofitselfsothataplaneiscoveredwithoutanygapsoroverlap.Aregionofthisplanewouldlookratherlikeajigsawpuzzlewhosepiecesareallidentical.Riceworkedprimarilywithpolygons,whichconsistonlyofstraightlines.Morespecifically,sheworkedwithconvexpolygons,inwhichthelinejoininganytwopointsonthepolygonliesentirelywithinthepolygonitselforononeofitsedges.(Afive-pointedstar,forexample,doesnotqualifyasaconvexpolygon.)BythetimeRicetookuptiling,itsbasicpropertieshadbeenestablished.Obviously,anysquarecantiletheplane,asmanykitchenfloorshavedemonstrated.Equilateraltrianglesarealsoafairlyclear-cutcase.Thereisoneotherregularpolygon(apolygonwhoseangles,andsides,areequal)thatcantiletheplane:thehexagon.Thisfactwasbuildingtheirhoneycombs.Andwhatofirregularpolygons?Asitturnsout,anytriangleorquadrilateral,nomatterhowdevoidofregularity,willtiletheplane.Ontheotherhand,noconvexpolygonwithmorethansixsidescandoso,andthethreeclassesofconvexhexagonsthatcanwereuncoveredbytheendoftheFirstWorldWar.SotheonlyrealquestionlestbythetimeMarjorieRicebeganherworkwaswhichconvexpentagonstiletheplane.52.Themainsubjectofthepassageis____A)famousmathematicians.B)mathematicaleducation.C)tilingtheplane.D)irregularpolygons.TEXTGFirstreadthefollowingquestion.53.Whatisthepassagemainlyabout?A.faintdwarfstars.B.theevolutionarycycleoftheSun.C.theSunsfuelproblem.D.thedangersofinvisibleradiation.NowgothroughTEXTGandanswerquestion53.WhenweaccepttheevidenceofourunaidedeyesanddescribetheSunasayellowstar,wehavesummedupthemostimportantsinglefactaboutit——atthismomentintime.Itappearsprobable,however,thatsunlightwillbethecolorweknowforonlyanegligiblysmallpartoftheSunshistory.Stars,likeindividuals,ageandchange.Aswelookoutintospace,weseearoundusstarsatallstagesofevolution.Therearefaintbloodeddwarfssocoolthattheirsurfacetemperatureisamere4,000degreesFahrenheit,therearesearingghostsblazingat100,000degreesFahrenheitandalmosttoohottobeseenforthegreatpartoftheirradiationisintheinvisibleultravioletrange.Obviously,the"daylight"producedbyanystardependsonitstemperature,today(andforagestocome)ourSunisatabout10,000degreesFahrenheitandthismeansthatmostoftheSunslightisconcentratedintheyellowbandofthespectrumfallingslowlyinintensitytowardboththelongerandshorterlightwaves.Thatyellow"hump"willshiftastheSunevolvesandthelightofdaywillchangeaccordingly.ItisnaturaltoassumethatastheSungrowsolderandusesupitshydrogenfuel——whichitisnowdoingatthesparklingrateofhalfabilliontonsasecond——itwillbecomesteadilycolderandcolder.53.Whatisthepassagemainlyabout?

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