2026年托福《听力》真题备考资料

2026年托福《听力》真题备考资料Conversation1Narrator:Listentoaconversationbetweenastudentandauniversityfacilitiesmanager.Student:Hi,Mr.Henderson.Thanksforseeingmeonsuchshortnotice.I’mSarah,thestudentrepresentativefortheGraduateHousingCommittee.Manager:Hello,Sarah.Ofcourse.Ireceivedyouremailregardingtheproposedchangestothecampusbikestorage.HowcanIhelpyoutoday?Student:Well,aswediscussedinthelasttownhallmeeting,thegraduatestudentsarereallyconcernedaboutthelackofsecure,coveredbikestoragenearthenewresearchcomplex.Withtheexpansionofthecampus,theoutdoorracksarecompletelyoverflowing,andtheweatherdamageisbecomingasignificantissue.Manager:Iunderstandthefrustration.We’veseena40%increaseinbikeregistrationssincethefallsemesterbegan.However,convertingtheproposedspaceintoafullyenclosed,access-controlledbikeshelterisn'tasstraightforwardasitseemsduetozoningregulations.Student:Right,butIbroughtsomealternativesolutionsthatmightbypassthoseregulations.Welookedintothe"bikevalet"systemusedatthedowntownlibrary.Couldweimplementasimilarcheck-insystemwhereasecurityguardmonitorsthebikesduringpeakhours?Manager:Abikevaletisaninterestingidea,butthelaborcostsarehigh.We’dneedtohireatleasttwopart-timestaffmemberstocovertheshiftsfrom8AMto8PM.That’snotinourcurrentbudgetallocationforthisfiscalyear.Student:Whatifwesubsidizeitthroughasmallsemesterfee?Wesurveyedthestudents,andover80%saidthey’dbewillingtopayupto$20asemesterforguaranteedsecurestorage.Manager:That’sacompellingstatistic.Ifwecanguaranteetherevenuestream,Imightbeabletoreallocatefundsfromthegeneralmaintenancebudgettocovertheinitialsetupofthekiosks.Butwe’dneedtopresentasolidbusinessplantotheboardnextmonth.Student:IcandefinitelyhavethatdraftedbyFriday.I’llincludethesurveydataandacost-benefitanalysiscomparingthevaletsystemversusinstallingautomatedhigh-densitybikelockers.Manager:Theautomatedlockersareactuallymypreferenceforthelongterm.Theyrequirelessmanpower.However,theinstallationisinvasive.Haveyouconsideredtheimpactonthepedestrianwalkwayduringinstallation?Student:Yes,we’dproposedoingitinJulyduringthesummersessionwhenfoottrafficisatitslowest.Wecouldcordonofftheareawithoutdisruptingthemainflowtothelabs.Manager:Okay,Sarah.HereiswhatIneedyoutodo.Drafttheproposalfocusingontheautomatedlockersastheprimarysolution,butkeepthevaletsystemasabackupifthelockerinstallationpermitsaredenied.MakesuretohighlighttheJulyinstallationwindow.OnceIreviewyourdraft,I’llloopintheengineeringteamtoassessthestructuralloadoftheexistingpavement.Student:Thatsoundslikeaplan.I’llgetthattoyoubyFriday.Thanksforyourguidance,Mr.Henderson.Manager:You’rewelcome.It’sgoodtoseestudentstakinginitiativeonthis.Questions:1.Whydoesthestudentvisitthefacilitiesmanager?A.Tocomplainaboutthecostofparkingpermits.B.Toproposeasolutionforbicyclestorageissues.C.Torequestfundingforanewresearchcomplex.D.Toreportdamagetooutdoorbikeracks.2.Whatdoesthefacilitiesmanageridentifyasthemainobstacletobuildinganewbikeshelter?A.Lackofstudentinterest.B.Zoningregulations.C.Shortageofbuildingmaterials.D.Oppositionfromtheengineeringteam.3.Howdoesthestudentsuggestfundingthe"bikevalet"system?A.Byaskingforadonationfromthedowntownlibrary.B.Byreducingthebudgetforgeneralmaintenance.C.Bychargingstudentsasmallsemesterfee.D.Byusingmoneyfromtheresearchgrant.4.Whatisthemanager'spreferenceforalong-termsolution?A.Outdoorrackswithweathercovers.B.Amannedbikevaletstation.C.Automatedhigh-densitybikelockers.D.Acompletelynewparkinggarage.5.Whatdoesthemanageraskthestudenttoincludeintheproposal?A.Apetitionsignedbyallgraduatestudents.B.Acomparisonofcostsbetweendifferentlockersystems.C.Atimelineforthesummersessionconstruction.D.Ananalysisofthepedestrianwalkwayusage.AnswersandExplanations:1.B.Toproposeasolutionforbicyclestorageissues.解析：在对话开始时，学生Sarah表明自己是研究生住房委员会的代表，并提到了关于校园自行车存放的拟议变更。她随后提出了具体的解决方案（bikevalet或automatedlockers），因此她的目的是为了解决自行车存放问题。解析：在对话开始时，学生Sarah表明自己是研究生住房委员会的代表，并提到了关于校园自行车存放的拟议变更。她随后提出了具体的解决方案（bikevalet或automatedlockers），因此她的目的是为了解决自行车存放问题。2.B.Zoningregulations.解析：当学生建议将空间改造成完全封闭的自行车避难所时，经理回应道：“convertingtheproposedspaceintoafullyenclosed,access-controlledbikeshelterisn'tasstraightforwardasitseemsduetozoningregulations.”（由于分区法规，这并不像看起来那么简单）。因此，主要障碍是分区法规。解析：当学生建议将空间改造成完全封闭的自行车避难所时，经理回应道：“convertingtheproposedspaceintoafullyenclosed,access-controlledbikeshelterisn'tasstraightforwardasitseemsduetozoningregulations.”（由于分区法规，这并不像看起来那么简单）。因此，主要障碍是分区法规。3.C.Bychargingstudentsasmallsemesterfee.解析：当经理提到人工成本高且不在预算内时，学生建议：“Whatifwesubsidizeitthroughasmallsemesterfee?Wesurveyedthestudents,andover80%saidthey’dbewillingtopayupto20asemester...”解析：当经理提到人工成本高且不在预算内时，学生建议：4.C.Automatedhigh-densitybikelockers.解析：经理明确表示：“Theautomatedlockersareactuallymypreferenceforthelongterm.Theyrequirelessmanpower.”（自动储物柜实际上是我长期以来的首选。它们需要更少的人力）。解析：经理明确表示：“Theautomatedlockersareactuallymypreferenceforthelongterm.Theyrequirelessmanpower.”（自动储物柜实际上是我长期以来的首选。它们需要更少的人力）。5.C.Atimelineforthesummersessionconstruction.解析：经理最后指示学生起草提案时说：“MakesuretohighlighttheJulyinstallationwindow.”（确保强调七月的安装窗口）。学生之前提到过在七月夏季学期进行安装，因此经理希望提案中包含这个时间表。解析：经理最后指示学生起草提案时说：“MakesuretohighlighttheJulyinstallationwindow.”（确保强调七月的安装窗口）。学生之前提到过在七月夏季学期进行安装，因此经理希望提案中包含这个时间表。Conversation2Narrator:Listentoaconversationbetweenastudentandaprofessor.Student:ProfessorMiller?Doyouhaveamoment?Professor:Hi,Tom.Sure,comein.Iwasjustgradingyourlastbatchoflabreports.Youdidexcellentworkonthechemicalkineticssection.Student:Thanks,Professor.That’sactuallywhatIwantedtotalkabout.I’vebeenreadingsomearticlesonenzymaticcatalysts,specificallyhowtemperaturefluctuationsaffectreactionratesinindustrialsettings.IwaswonderingifIcouldfocusmytermpaperonthattopic.Professor:That’saveryrelevanttopic,especiallywiththecurrentpushforgreenchemistry.However,forasophomore-levelpaper,thatmightbeabitbroad.Industrialcatalysisinvolvescomplexvariableslikepressure,surfacearea,andsolventeffectsthatwehaven'tcoveredindepthyet.Student:Isee.IwashopingtoincorporatesomeofthedatafromtheinternshipIdidlastsummeratthepharmaceuticalplant.Theywerehavingissueswithenzymestabilityinthereactors.Professor:Aninternship?Thatchangesthings.Practicalexperienceisinvaluable.Ifyouhaveaccesstoreal-worlddata,thatcangroundyourpapersignificantly.Butyoustillneedtomakesureyou’renotjustpresentingacasestudy.Itneedstobealiteraturereviewwithahypothesis.Student:So,maybeIcouldfocusspecificallyonthedenaturationrateoftheenzymetheyuse—let'ssay,Lactase—whenexposedtovaryingpHlevels,ratherthanageneralindustrialoverview?Professor:That’smuchbetter.Lactaseisaclassicmodel.Youcancomparetheindustrialdatayouhavewithstandardtextbookmodels.Justbecarefulwiththemath.Calculatingthedenaturationconstantsrequirespreciseintegration.Student:Right,theArrheniusequation.IthinkIcanhandlethat.Iwasplanningtousethelab’ssoftwaretomodelthedecaycurves.Professor:Good.ButTom,awordofcaution.Sinceyouareusingproprietarydatafromyourinternship,youmustensureyouanonymizeit.Youcannotdisclosespecificprocessparametersthatbelongtothecompany.Youshouldmentioninyourmethodologythatthedataisfromaconfidentialsource.Student:Oh,Ididn'tthinkaboutthat.Yes,I’llstripoutanyspecifictemperaturethresholdsorconcentrationsthataretradesecrets.I’lljustusetherelativepercentages.Professor:Exactly.Wewanttoencourageappliedscience,butwemustrespectintellectualproperty.Onceyou’vesanitizedthedata,Ithinkthiscouldbeastrongpaper.Whydon'tyououtlineyourintroductionandmethodologyandbringittomyofficehoursonTuesday?Student:Willdo.Thanksforthedirection,Professor.IwasworriedI’dhavetosticktotextbookexamples.Professor:Notatall.Aslongasthescientificrigoristhere,Iencourageexploringuniquedatasources.SeeyouTuesday.Questions:1.Whatisthestudent'sinitialpurposeforvisitingtheprofessor?A.Toaskforanextensiononalabreport.B.Todiscussapotentialtopicforhistermpaper.C.Tocomplainaboutthegradingofhislastassignment.D.Toapplyforasummerinternship.2.Whyistheprofessorinitiallyhesitantaboutthestudent'sproposedtopic?A.Thetopicistoobroadforthecourselevel.B.Thetopicisnotrelatedtogreenchemistry.C.Theprofessordoesnotbelievethestudent'sdataisaccurate.D.Thetopichasbeencoveredbytoomanyotherstudents.3.Whatinformationdoesthestudentrevealthatchangestheprofessor'smind?A.Hehasalreadywrittenadraftofthepaper.B.Hehasaccesstoproprietarydatafromaninternship.C.HeisfamiliarwiththeArrheniusequation.D.Hehasabackgroundinpharmaceuticalengineering.4.Whatwarningdoestheprofessorgiveregardingtheinternshipdata?A.Thedatamightbetoooldtobeuseful.B.Thedataislikelyinaccurateduetohumanerror.C.Thestudentmustanonymizethedatatoprotecttradesecrets.D.Thestudentneedspermissionfromthecompany'slegalteam.5.Whatdoestheprofessoraskthestudenttobringtothenextmeeting?A.Thefinalversionofthetermpaper.B.Abibliographyofsources.C.Anoutlineoftheintroductionandmethodology.D.Therawdatafromthepharmaceuticalplant.AnswersandExplanations:1.B.Todiscussapotentialtopicforhistermpaper.解析：学生在开头提到：“IwaswonderingifIcouldfocusmytermpaperonthattopic.”他是来寻求教授对论文选题的建议的。解析：学生在开头提到：“IwaswonderingifIcouldfocusmytermpaperonthattopic.”他是来寻求教授对论文选题的建议的。2.A.Thetopicistoobroadforthecourselevel.解析：教授说：“However,forasophomore-levelpaper,thatmightbeabitbroad.Industrialcatalysisinvolvescomplexvariables...thatwehaven'tcoveredindepthyet.”教授认为对于一个二年级的论文来说，这个题目太宽泛且涉及未深入讲解的复杂变量。解析：教授说：“However,forasophomore-levelpaper,thatmightbeabitbroad.Industrialcatalysisinvolvescomplexvariables...thatwehaven'tcoveredindepthyet.”教授认为对于一个二年级的论文来说，这个题目太宽泛且涉及未深入讲解的复杂变量。3.B.Hehasaccesstoproprietarydatafromaninternship.解析：当学生提到他在制药厂的实习经历以及真实数据时，教授的态度发生了转变：“Aninternship?Thatchangesthings.Practicalexperienceisinvaluable.”解析：当学生提到他在制药厂的实习经历以及真实数据时，教授的态度发生了转变：“Aninternship?Thatchangesthings.Practicalexperienceisinvaluable.”4.C.Thestudentmustanonymizethedatatoprotecttradesecrets.解析：教授特别强调了知识产权问题：“Sinceyouareusingproprietarydatafromyourinternship,youmustensureyouanonymizeit...Youcannotdisclosespecificprocessparametersthatbelongtothecompany.”解析：教授特别强调了知识产权问题：“Sinceyouareusingproprietarydatafromyourinternship,youmustensureyouanonymizeit...Youcannotdisclosespecificprocessparametersthatbelongtothecompany.”5.C.Anoutlineoftheintroductionandmethodology.解析：对话结束时，教授说：“Whydon'tyououtlineyourintroductionandmethodologyandbringittomyofficehoursonTuesday?”解析：对话结束时，教授说：“Whydon'tyououtlineyourintroductionandmethodologyandbringittomyofficehoursonTuesday?”Lecture1Narrator:ListentopartofalectureinanAstronomyclass.TheprofessorisdiscussingOrbitalMechanics.Professor:Todaywearegoingtodelveintothefascinatingworldoforbitalmechanics,specificallylookingathowcelestialbodiesinteractwitheachother.We’veallseendiagramsofplanetsmovinginperfectellipsesaroundastar,butinreality,thesolarsystemisachaoticplacewiththousandsofobjectspullingononeanother.OneofthemostfundamentalconceptsyouneedtograspistheVis-vivaequation.Thisequationallowsustocalculatethespeedofanobjectinorbitatanyspecificpointinthatorbit.Itrelatesthekineticenergyoftheobjecttoitspositioninthegravitationalfield.Thestandardformlookslikethis:vHere,vistherelativespeedofthetwobodies.GMisthestandardgravitationalparameter,whereGisthegravitationalconstantandMisthemassofthecentralbody.risthedistancebetweenthetwobodiesatthatspecificmoment,andaisthesemi-majoraxisoftheorbit.Whyisthisimportant?Well,ittellsusthatasaplanetgetsclosertothestar(whenrdecreases),itsvelocityvmustincrease.ThisisKepler’sSecondLawinaction—theplanetsweepsoutequalareasinequaltimes.ButtheVis-vivaequationgivesustheprecisenumbers.Now,let'sconsideramorecomplexscenario:orbitaltransfers.HowdowegetaspacecraftfromEarthtoMars?Wedon'tjustpointtherocketatMarsandfire.WeusewhatiscalledaHohmannTransferOrbit.Thisisthemostfuel-efficientmaneuvertomovebetweentwoorbitsthatlieinthesameplane.Imaginetwocircularorbits:aninnerorbit(Earth)andanouterorbit(Mars).TheHohmanntransferinvolvesanellipticalorbitthatistangenttobothcircles.Thespacecraftfiresitsengineattheperigee—theclosestpointtoEarth—toenterthetransferellipse.Itthencoastsuntilitreachestheapogee—thefarthestpointfromEarth,whichisexactlyatMars'orbit—andfiresitsengineagaintocircularizeitsorbitandmatchMars'speed.Tocalculatethevelocityrequiredtoenterthistransferorbitattheperigee,weagainusetheVis-vivaequation.Butthereisacatch.Thiscalculationassumesatwo-bodyproblem:thespacecraftandtheSun.Inreality,thespacecraftisstillinfluencedbyEarth'sgravitywhenitstarts,andbyMars'gravitywhenitarrives.ThisregionwheretwogravitationalfieldscompeteiscalledtheSphereofInfluence.TheradiusoftheSphereofInfluencecanbeapproximatedusingthisformula:rWhereaisthesemi-majoraxisoftheprimarybody'sorbitaroundthecentralbody,misthemassoftheprimarybody(likeEarth),andMisthemassofthecentralbody(theSun).Understandingtheseboundariesiscrucialformissionplanners.Ifaspacecrafttriestoperformamaneuvertooclosetoaplanetwithoutaccountingforthatplanet'sSphereofInfluence,thedelta-v—thechangeinvelocityrequired—willbemiscalculated,andthemissioncouldfailtoinsertintothetargetorbit.Infuturelectures,wewilllookatnon-Hohmanntransfers,likegravityassists,whereweuseaplanet'sgravitytospeeduporslowdownaspacecraft.Butfortoday,makesureyouunderstandhowtheVis-vivaequationgovernstheenergychangesduringastandardHohmanntransfer.Questions:1.Whatisthemainpurposeofthelecture?A.ToexplainthehistoryofthediscoveryofKepler’slaws.B.Tocomparethegravityofdifferentplanetsinthesolarsystem.C.Toexplainthemathematicalprinciplesgoverningorbitalspeedandtransfers.D.Todiscussthedesignofrocketenginesusedinspacetravel.2.Accordingtotheprofessor,whatdoestheVis-vivaequationhelpastronomerscalculate?A.Themassofadistantstar.B.Thespeedofanobjectataspecificpointinitsorbit.C.ThetimeittakesforacomettopassbyEarth.D.Thetemperatureofaplanet'satmosphere.3.HowdoestheprofessordescribeaHohmannTransferOrbit?A.Itisastraight-linepathbetweentwoplanets.B.Itisanellipticalorbittangenttotwocircularorbits.C.Itisahigh-speedmaneuverusedtoescapethesolarsystem.D.Itisatheoreticalmodelthatcannotbeusedinrealmissions.4.IntheVis-vivaequationprovidedbytheprofessor,whatdoesthevariable'r'represent?A.Theradiusofthecentralbody.B.Thesemi-majoraxisoftheorbit.C.Thedistancebetweenthetwobodiesataspecificmoment.D.Thegravitationalconstant.5.Whatisthe"SphereofInfluence"?A.Theareawhereaplanet'smagneticfieldisstrongest.B.Theregionwherethegravitationalfieldsoftwobodiescompete.C.Thezonearoundastarwhereplanetscanform.D.Themaximumaltitudeaspacecraftcanreach.6.WhydoestheprofessormentiontheformularSOIA.Toshowhowtocalculatetheboundaryforgravitationaldominance.B.ToprovethattheSunisthemostmassiveobjectinthesolarsystem.C.Tocalculatethefuelneededforarocketlaunch.D.Todeterminetheshapeofaplanet'sorbit.AnswersandExplanations:1.C.Toexplainthemathematicalprinciplesgoverningorbitalspeedandtransfers.解析：教授开篇介绍了轨道力学，并详细讲解了Vis-viva方程（计算速度）和HohmannTransfer（轨道转移），核心在于解释这些数学原理。解析：教授开篇介绍了轨道力学，并详细讲解了Vis-viva方程（计算速度）和HohmannTransfer（轨道转移），核心在于解释这些数学原理。2.B.Thespeedofanobjectataspecificpointinitsorbit.解析：教授明确指出：“TheVis-vivaequation...allowsustocalculatethespeedofanobjectinorbitatanyspecificpointinthatorbit.”解析：教授明确指出：“TheVis-vivaequation...allowsustocalculatethespeedofanobjectinorbitatanyspecificpointinthatorbit.”3.B.Itisanellipticalorbittangenttotwocircularorbits.解析：教授描述道：“TheHohmanntransferinvolvesanellipticalorbitthatistangenttobothcircles.”解析：教授描述道：“TheHohmanntransferinvolvesanellipticalorbitthatistangenttobothcircles.”4.C.Thedistancebetweenthetwobodiesataspecificmoment.解析：在解释公式时，教授说：“risthedistancebetweenthetwobodiesatthatspecificmoment”。解析：在解释公式时，教授说：“risthedistancebetweenthetwobodiesatthatspecificmoment”。5.B.Theregionwherethegravitationalfieldsoftwobodiescompete.解析：教授定义SphereofInfluence为：“ThisregionwheretwogravitationalfieldscompeteiscalledtheSphereofInfluence.”解析：教授定义SphereofInfluence为：“ThisregionwheretwogravitationalfieldscompeteiscalledtheSphereofInfluence.”6.A.Toshowhowtocalculatetheboundaryforgravitationaldominance.解析：教授在给出公式后解释说：“Understandingtheseboundariesiscrucialformissionplanners.”该公式用于计算引力影响范围的边界（即SphereofInfluence的半径）。解析：教授在给出公式后解释说：“Understandingtheseboundariesiscrucialformissionplanners.”该公式用于计算引力影响范围的边界（即SphereofInfluence的半径）。Lecture2Narrator:ListentopartofalectureinaBiologyclass.TheprofessorisdiscussingMycology.Professor:Whenwethinkofforests,ourmindsusuallyconjureimagesoftoweringtrees,lushcanopies,andperhapstheanimalsthatinhabitthem.Butbeneaththesoil,hiddenfromourview,liesoneofthemostcomplexandcriticalnetworksinnature:theWoodWideWeb.Thisisthecolloquialtermforthemycorrhizalnetworkthatconnectsplantrootsviafungalthreads.Thesefungiarenotjustparasites;theyformsymbioticrelationshipswithplants.Theplantprovidesthefungiwithcarbohydrates,producedthroughphotosynthesis.Inexchange,thefungiscavengethesoilfornutrientslikephosphorusandnitrogen,whichareoftendifficultforplantstoaccessontheirown,anddeliverthemtotheplantroots.However,recentresearchhasrevealedthatthisnetworkdoesmorethanjustfacilitateindividualnutrientexchange.Itconnectsentireforests.Treesofthesamespecies,andeventreesofdifferentspecies,cancommunicateandshareresourcesthroughthesefungallinks.Let'stakealookatthe"MotherTree"hypothesis.EcologistSuzanneSimardhasfoundthatolder,largertrees—oftenreferredtoashubtreesormothertrees—serveascentralnodesinthisnetwork.Theyhavedeep,establishedrootsystemsconnectedtovastfungalnetworks.Whydoesthismatter?Well,itturnsoutthatthesemothertreescanrecognizetheirownkin.Throughthefungalnetwork,theycandetectthechemicalsignaturesoftheirseedlings.Studieshaveshownthatmothertreeswillpreferentiallysendcarbonandnutrientstotheirownoffspringoverunrelatedtrees.Theyessentially"nurse"theyoungtrees,increasingtheirchancesofsurvivalintheshaded,competitiveforestfloor.Butthenetworkalsoservesasawarningsystem.Whenatreeisattackedbypests,sayaphidsorbarkbeetles,itreleasesdefensechemicals—phenolsandenzymes—notjusttoprotectitself,buttosignalneighboringtreesthroughthefungalnetwork.Uponreceivingthesesignals,theneighboringtrees—eventhoseofdifferentspecies—begintoproducetheirowndefensechemicalsbeforethepestsevenreachthem.It’sabiologicalearlywarningsystem.Thereisalsoadarkersidetothisinteraction,orperhapsapragmaticone.Someplants,liketheinvasiveknapweed,havebeenshowntousethenetworktoattackcompetitors.Theycanfunneltoxinsintothefungalweb,whichthengetsdeliveredtotherootsofneighboringplants,inhibitingtheirgrowth.Thiscomplexitychallengesourtraditionalunderstandingofforestecology.Weusedtoviewtreesassolitaryindividualscompetingsolelyforlightandwater.Now,weunderstandthataforestismorelikeasuperorganism.Thesurvivaloftheforestoftendependsonthehealthofthefungalconnectionsbelow.Inconservationefforts,thismeanswecan'tjustreplanttreesrandomly.Wemustpreservethe"mycorrhizalintegrity"ofthesoil.Ifweclear-cutaforest,thefungalnetworkdies,andreplantedseedlingsstruggletoestablishtheconnectionstheyneedtothrive.Sustainableforestrynowofteninvolvesretainingmothertreestoactasnodestoreconnectthefragmentednetwork.Questions:1.Whatisthelecturemainlyabout?A.Theprocessofphotosynthesisinforestcanopies.B.Thedestructivenatureofinvasiveplantspecies.C.Theroleoffungalnetworksinforestecosystems.D.Thelifecycleofbarkbeetlesandaphids.2.Accordingtotheprofessor,howdofungibenefitinthesymbioticrelationshipwithplants?A.Theyreceivecarbohydratesfromtheplants.B.Theyusetheplantstospreadtheirspores.C.Theygetprotectionfromthesun.C.Theyconsumedeadplantmatterontheforestfloor.3.Whatdoestheprofessorimplyabout"MotherTrees"?A.Theyaretheoldesttreesintheforestandactascentralhubs.B.Theyareresistanttoalltypesofpests.C.Theydonotshareresourceswithotherspecies.D.Theygrowfasterthanothertreesbecauseoftheirsize.4.Whydoestheprofessormentionthe"warningsystem"?A.Toexplainhowtreesattractpollinators.B.Toillustratehowtreescommunicatedangertoneighbors.C.Toshowhowfungiprotectthemselvesfromfire.D.Todescribehowpestschoosewhichtreestoattack.5.Whatexampledoestheprofessorgiveofaplantusingthenetworkaggressively?A.Amothertreewithholdingnutrientsfromitskin.B.Aninvasiveknapweedsendingtoxinstocompetitors.C.Apinetreestealingwaterfromanearbyoak.D.Afunguskillingatreethatistooold.6.Whatdoestheprofessorsuggestaboutfutureforestrypractices?A.Forestsshouldbeclearedtopreventpestinfestations.B.Replantingshouldfocusonasinglespeciesforefficiency.C.Conservationeffortsmustpreservetheundergroundfungalnetwork.D.Mothertreesshouldberemovedtomakeroomforyoungertrees.AnswersandExplanations:1.C.Theroleoffungalnetworksinforestecosystems.解析：整篇讲座围绕菌根网络（WoodWideWeb）展开，讲述了它如何连接树木、传递养分和信号。解析：整篇讲座围绕菌根网络（WoodWideWeb）展开，讲述了它如何连接树木、传递养分和信号。2.A.Theyreceivecarbohydratesfromtheplants.解析：教授解释道：“Theplantprovidesthefungiwithcarbohydrates...Inexchange,thefungiscavengethesoilfornutrients...”真菌从植物那里获得碳水化合物。解析：教授解释道：“Theplantprovidesthefungiwithcarbohydrates...Inexchange,thefungiscavengethesoilfornutrients...”真菌从植物那里获得碳水化合物。3.A.Theyaretheoldesttreesintheforestandactascentralhubs.解析：教授提到：“EcologistSuzanneSimardhasfoundthatolder,largertrees—oftenreferredtoashubtreesormothertrees—serveascentralnodesinthisnetwork.”解析：教授提到：“EcologistSuzanneSimardhasfoundthatolder,largertrees—oftenreferredtoashubtreesormothertrees—serveascentralnodesinthisnetwork.”4.B.Toillustratehowtreescommunicatedangertoneighbors.解析：教授描述了当树木受到害虫攻击时，会通过真菌网络向邻近树木发送信号，让它们提前产生防御化学物质。这是一个预警系统。解析：教授描述了当树木受到害虫攻击时，会通过真菌网络向邻近树木发送信号，让它们提前产生防御化学物质。这是一个预警系统。5.B.Aninvasiveknapweedsendingtoxinstocompetitors.解析：教授举了入侵植物knapweed的例子：“Someplants,liketheinvasiveknapweed,havebeenshowntousethenetworktoattackcompetitors.Theycanfunneltoxinsintothefungalweb...”解析：教授举了入侵植物knapweed的例子：“Someplants,liketheinvasiveknapweed,havebeenshowntousethenetworktoattackcompetitors.Theycanfunneltoxinsintothefungalweb...”6.C.Conservationeffortsmustpreservetheundergroundfungalnetwork.解析：讲座最后，教授强调可持续林业必须保留“mycorrhizalintegrity”（菌根完整性），即保留地下真菌网络，尤其是保留MotherTrees来重新连接网络。解析：讲座最后，教授强调可持续林业必须保留“mycorrhizalintegrity”（菌根完整性），即保留地下真菌网络，尤其是保留MotherTrees来重新连接网络。Lecture3Narrator:ListentopartofalectureinanArtHistoryclass.TheprofessorisdiscussingRenaissanceArt.Professor:We’vespentthelastfewweeksdiscussingtheHighRenaissance—theeraofMichelangeloandRaphael—andtheemphasisonhumanism,perspective,andidealizedbeauty.Today,however,we’reshiftingourgazetoMannerism,astylethatemergedintheyearsfollowingtheHighRenaissance,roughlybetween1520and1600.Mannerismisoftenmisunderstood.It’seasytolookataManneristpaintingandthinktheartistsimplydidn'tknowhowtodrawcorrectly,becausethefiguresoftenlookelongated,theirposesaretwistedandimpossible,andthecolorscanbejarring.Butthisisfarfromthetruth.ManneristartistslikePontormo,Parmigianino,andBronzinoweremastersofanatomyandperspective.Theyweren'tpaintingbadly;theywerepaintingartificiallyonpurpose.Mannerismisoftenmisunderstood.It’seasytolookataManneristpaintingandthinktheartistsimplydidn'tknowhowtodrawcorrectly,becausethefiguresoftenlookelongated,theirposesaretwistedandimpossible,andthecolorscanbejarring.Butthisisfarfromthetruth.ManneristartistslikePontormo,Parmigianino,andBronzinoweremastersofanatomyandperspective.Theyweren'tpaintingbadly;theywerepaintingartificiallyonpurpose.Yousee,theartistsoftheHighRenaissancehadachievedsuchperfectioninrepresentingnaturethattheirsuccessorsfelttherewasnowherelefttogo.HowdoyousurpassMichelangelo’sDavid?Youdon’t.So,theManneristsdecidedtobreaktherules.Theymovedawayfromthenaturalismandharmonyofthepreviousgeneration.Theysoughtsophistication,elegance,andasenseofinstability.Let'slookatthreekeycharacteristicsofMannerism.FirstisFig