2019.6月英语六级真题

第1页共9页2019年6月大学英语六级考试真题PartIWriting(30minutes)Directions:Forthispart,youareallowed30minutestowriteanessayontheimportanceofmotivationandmethodsinlearning.Youcanciteexamplestoillustrateyourviews.Youshouldwriteatleast150wordsbutnomorethan200words.________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________PartⅡListeningComprehension(30minutes)PartⅢReadingComprehension(40minutes)SectionADirections:Inthissection,thereisapassagewithtenblanks.Youarerequiredtoselectonewordforeachblankfromalistofchoicesgiveninawordbankfollowingthepassage.Readthepassagethroughcarefullybeforemakingyourchoices.Eachchoiceinthebankisidentifiedbyaletter.PleasemarkthecorrespondingletterforeachitemonAnswerSheet2withasinglelinethroughthecentre.Youmaynotuseanyofthewordsinthebankmorethanonce.Steelisvaluedforitsreliability,butnotwhenitgetscold.Mostformsofsteel26becomebrittle(脆的)attemperaturesbelowabout-25℃unlesstheyaremixedwithothermetals.Now,though,anoveltypeofsteelhasbeendevelopedthatresists27atmuchlowertemperatures,whileretainingitsstrengthandtoughness—withouttheneedforexpensive28.Steel’sfragilityatlowtemperaturesfirstbecameamajorconcernduringtheSecondWorldWar.AfterGermanU-boatstorpedoed(用鱼雷攻击)numerousBritishships,a2,700-strongfleetofcheap-and-cheerful“Libertyships”wasintroducedtoreplacethelostvessels,providingalifelineforthe29British.Butthesteelshellsofhundredsoftheships30intheicynorthAtlantic,and12brokeinhalfandsank.Brittlenessremainsaproblemwhenbuildingsteelstructuresincoldconditions,suchasoilrigsintheArctic.Soscientistshave31tofindasolutionbymixingitwithexpensivemetalssuchasnickel.YuujiKimuraandcolleaguesinJapantriedamorephysical32.Ratherthanaddingothermetals,theydevelopedacomplexmechanicalprocessinvolvingrepeatedheatingandveryseveremechanicaldeformation,knownastempforming.Theresultingsteelappearstoachieveacombinationofstrengthandtoughnessthatis33to第2页共9页thatofmodemsteelsthatareveryrichinalloycontentand,therefore,veryexpensive.Kimura’steamintendstouseitstempformedsteeltomakeultra-highstrengthparts,suchasbolts.Theyhopetoreduceboththenumberof34neededinaconstructionjobandtheirweight—byreplacingsolidsupportswith35tubes,forexample.Thiscouldreducetheamountofsteelneededtomakeeverythingfromautomobilestobuildingsandbridges.A)abruptlyI)crackedB)additivesJ)fracturesC)approachK)hollowD)ardentlyL)relevantE)besiegedM)reshuffledF)channelN)strivedG)comparableO)violentH)componentsSectionBDirections:Inthissection,youaregoingtoreadapassagewithtenstatementsattachedtoit.Eachstatementcontainsinformationgiveninoneoftheparagraphs.Identifytheparagraphfromwhichtheinformationisderived.Youmaychooseaparagraphmorethanonce.Eachparagraphismarkedwithaletter.AnswerthequestionsbymarkingthecorrespondingletteronAnswerSheet2.Thefutureofpersonalsatellitetechnologyishere—arewereadyforit?A)Satellitesusedtobetheexclusiveplaythingsofrichgovernmentsandwealthycorporations.Butincreasingly,asspacebecomesmoredemocratized,theyarecomingwithinreachofordinarypeople.Justlikedrones(无人机)beforethem,miniaturesatellitesarebeginningtofundamentallytransformourconceptionsofwhogetstodowhatupaboveourheads.B)AsarecentreportfromtheNationalAcademyofScienceshighlights,thesesatellitesholdtremendouspotentialformakingsatellite-basedsciencemoreaccessiblethaneverbefore.However,asthecostofgettingyourownsatelliteinorbitdropssharply,therisksofirresponsibleusegrow.Thequestionhereisnolonger“Canwe?”but“Shouldwe?”Whatarethepotentialdownsidesofhavingasliceofspacedenselypopulatedbyequipmentbuiltbypeoplenottraditionallylabeledas“professionals”?Andwhatwouldtheresponsibleandbeneficialdevelopmentanduseofthistechnologyactuallylooklike?Someoftheanswersmaycomefromanonprofitorganizationthathasbeenbuildingandlaunchingamateursatellitesfornearly50years.C)Havingyourpersonalsatellitelaunchedintoorbitmightsoundlikeanideastraightoutofsciencefiction.Butoverthepastfewdecadesauniqueclassofsatelliteshasbeencreatedthatfitsthebill:CubeSats.The“Cube”heresimplyreferstothesatellite'sshape.ThemostcommonCubeSatisa第3页共9页10cmcube,sosmallthatasingleCubeSatcouldeasilybemistakenforapaperweightonyourdesk.Thesemini-satellitescanfitinalaunchvehicle'sformerly“wastedspace.”MultiplescanbedeployedincombinationformorecomplexmissionsthancouldbeachievedbyoneCubeSatalone.D)Withintheircompactbodiestheseminutesatellitesareabletohousesensorsandcommunicationsreceivers/transmittersthatenableoperatorstostudyEarthfromspace,aswellasspacearoundEarth.They’reprimarilydesignedforLowEarthOrbit(LEO)—aneasilyaccessibleregionofspacefromaround200to800milesaboveEarth,wherehuman-tendedmissionsliketheHubbleSpaceTelescopeandtheInternationalSpaceStation(ISS)hangout.Buttheycanattainmoredistantorbits;NASAplansformostofitsfutureEarth-escapingpayloads(tothemoonandMarsespecially)tocarryCubeSats.E)Becausethey'resosmallandlight,itcostsmuchlesstogetaCubeSatintoEarth’sorbitthanatraditionalcommunicationsorGPSsate