Unit 3 Times change！同步练习-2022-2023学年高中英语外研版2019选择性必修第二册

选择性必修第二册Unit3同步练习(限时：35分钟)Ⅰ.阅读理解ABrisbaneisanexcitingcity,votedasoneofthemostliveablecitiesinAustralia.Itsfinefoodwillmakeyouhatetoleave.Herearefourfamousrestaurants.KingsleysSteak&CrabHouseLocatedonthewaterfrontoftheBrisbaneRiverwithviewsoftheStoryBridge,KingsleysSteak&CrabHousesuppliesanincomparableidealsettingforlunchordinner.Withimpressiveviewsandacombinationofbothindoorandoutdoorseating,itattractsalotoftouriststohaveauniquediningexperiencehere.Italsooffersfreshseafood,includingAlaskakingcrabs,high­gradewineandfriendlystaff.Ratesperperson:$35—$45MooMooTheWineBarMooMooTheWineBarisanaward­winningchainoflakesidediningsites.Originally,itwasfoundedin2005byStevenAdams,awell­knownchef.MooMoohassinceclaimedmanyawards,includingQueensland'sBestSteakRestaurant2008,GoldRiversideRestaurantoftheYear2007,andGoldCoast'sBestSteakRestaurant.Ratesperperson:$40－$45JellyfishRestaurantThebeautifulviewsovertheBrisbaneRiverarejustastartertocomefromJellyfishRestaurant.Itsaimistosourceandservefishesof8speciesdaily,tolearnandunderstandthetextureandqualitiesofeachspeciesandrecommendthebestwaytocooktoitscustomersandserveforthefineexperience.Ratesperperson:$30－$45TibetianKitchenForafinediningexperienceinBrisbane,itishardtogopastTibetianKitchenfoundedbytheaward­winningwell­knownchefMattMoran.WithabeautifulsettingonthebankoftheBrisbaneRiver,TibetianKitchenisallaboutbeautifullypresenteddisheswhichlooklikepiecesofperfectartwork.ThisiswhatTibetianKitchendiffersfromotherrestaurantsabove.Ratesperperson:$35－$451.WhatmakesKingsleysSteak&CrabHouseattractivetotourists?A.Itsgreatseafood.B.Itsfriendlyservice.C.Itshigh­gradewine.D.Itsbeautifuldiningsurroundings.2．Whichwillyouchooseifyouintendtolearnsomecookingskills?A.KingsleysSteak&CrabHouse.B.MooMooTheWineBar.C.JellyfishRestaurant.D.TibetianKitchen.3．HowisTibetianKitchendifferentfromotherrestaurantsmentionedinthetext?A.Itsenvironmentiselegant.B.Itsfoodratesaremuchlower.C.Itschefshavewonmanyawards.D.Itsfoodpresentationisratherpleasing.BMalinPinskyhadthefirstoftwolightbulbmomentsin2003whilecrossingDrakePassage.Hewasthenstandingonthebridgeofaresearchshipandwasscanningtheskyforseabirds,whichwasoneofhisdutiesasaresearchtechnicianonthecruise(海上航游).Justfivemonthsearlierhehadfinishedcollege,wherehestudiedbiologyandenvironmentalscience.Astheshipenterednutrient­richAntarcticwaters,whalessuddenlyshowedupallaroundtheship.Thatmomentonthebridgehelpedhimrealizethattheoceanlooksfeaturelessfromthetop,butthere'ssomuchgoingonunderneath.Thesecondlightbulbmomenthithimseveralmonthslater.Pinskywasthenanintern(实习生)inWashington，D.C.Hisjobwasmakingphotocopies.Itwasaroundthetimewhentwobigreportshadcomeout.BothfocusedonwhatpoliciesmightbestpreserveU．S.oceanresources.“Irealizedwehavealltheselawsandpoliciesthatdeterminehowweasasocietyinteractwiththeocean.Butthey'refaroutofdate.Wedon'tyethavethesciencetoknowwhatthenewpolicyshouldbe，”Pinskysaid.Todayherunsalabwithabout20workers.Histeamwantstoseekhowourchangingclimate,aswellasoverfishingandhabitatdestruction,mightbedrivingchangesinfishandotheranimalsinthesea.Tofindout,teammemberstraveleachyeartocoralreefsnearthePhilippines.There,theycarefullycatalogpopulationsofdifferentfish.Theycollectdataonthegrowthandmatingofthesefish,theirdiversityandotherfactors.“Pinsky'sbroadapproachtotheproblem—lookingatspecies,wheretheyliveandhowfisheriesaremanaged—issettingthepaceforotherscientists，”saysKimberlyOremus,afisheryeconomistattheUniversityofDelawareinNewark.“Pinskyispushingthewholefieldtorespondtohisgrowingbodyofresearch.”4．WhatmadePinskyhavethefirstlightbulbmoment?A.Thevastnessoftheocean.B.Thesightofseabirdsinthesky.C.TheviewofDrakePassage.D.Theappearanceofwhalesaroundtheship.5．WhatdidPinskyrealizewhenhewasaninterninWashington,D．C.?A.Heneededtotakemorephotosofoceans.B.Heshoulddosomethingtoupdateoceanpolicies.C.TheU．S.oceanresourcesneedtobebetterpreserved.D.Therehavealreadybeenperfectpoliciestopreservetheocean.6．WhatdoesPinsky'steamfocuson?A.Theharmofoverfishing.B.Featuresofdifferentfish.C.Factorsaffectingoceanecosystems.D.Thereasonsforglobalwarming.7．What'sKimberlyOremus'attitudetowardsPinsky'sresearch?A.Positive. B．Doubtful.C.Disapproving. D．Uninterested.CYou'reonadiet,butthesmellofpopcorninthemovietheaterlobbybringsyouaseeminglyirresistibledesire.Withinseconds,you'veorderedatubofthestuffandhaveeatenseveralhandfuls.Foodimpulsivity(冲动性),whichhasbeenlinkedtoexcessivefoodintake,mayleadtomanyhealthproblems,suchasweightgainorobesity.However,ateamofresearchershasnowidentifiedaspecificcircuitinthebrainthatinfluencesfoodimpulsivity,creatingthepossibilitythatscientistscansomedaydeveloptherapyforovereating.“Yourbrainhaspotentialabilitytorepelimpulsiveeating，”saidEmilyNoble,anassistantprofessorintheUGACollegeofFamily.“Inexperimentalmodels,youcanactivatethatcircuitryandgetaspecificbehavioralresponse.”Usingaratmodel,researchersfocusedonagroupofbraincellsthatproduceatypeoftransmitterinthehypothalamus(下丘脑)calledMCH.“WhilepreviousresearchhasshownthatelevatingMCHlevelsinthebraincanincreasefoodintake,thisstudyisthefirsttoshowthatitalsoplaysaroleinimpulsivebehavior，”Noblesaid.Totestimpulsivity,researcherstrainedratstopressalever(杠杆)toreceivea“delicious,high­fat,high­sugar”button,Noblesaid.However,therathadtowait20secondsbetweenleverpresses.Iftheratpressedthelevertoosoon,ithadtowaitanadditional20seconds.ResearchersthenusedadvancedtechniquestoactivateaspecificMCHneural(神经的)pathwayfromthehypothalamustothehippocampus,apartofthebraininvolvedwithlearningandmemoryfunction.ResultsindicatedMCHdoesn'taffecthowmuchtheanimalslikedthefoodorhowhardtheywerewillingtoworkforthefood.Rather,itactedontheanimals'abilitytostopthemselvesfromtryingtogetthefood.ActivatingthisspecificpathwayofMCHneuronscontrolledimpulsivebehaviorwithoutaffectingnormaleatingforcaloricneedormotivationtoconsumedeliciousfood.Thisopensthedoortothepossibilitythatonedaywemightbeabletodevelopanewtreatmentforovereatingthathelpspeoplesticktoadietwithoutreducingnormalappetiteormakingdeliciousfoodslessdelicious.8.Theauthorusesanexampleatthebeginningofthetextto________．A.introducethetopicB.describeone'scharacterC.presentanargumentD.clarifythewritingpurpose9．Whatdoestheunderlinedword“repel”inParagraph3probablymean?A.Cause. B．Refuse.C.Choose. D．Confirm.10．Whatdotheresearcherswanttofindthroughtheratexperiment?A.HowtoincreasetheMCHlevels.B.Whatfactorscausefoodimpulsivity.C.WhetherMCHisrelatedtoimpulsiveeating.D.Whetherthenewtherapywillinfluencenormaleating.11．What'sthelastparagraphmainlyabout?A.Thesignificanceofthestudy.B.Thefurtherresearchonovereating.C.Theimportanceofstickingtoadiet.D.Thepossibilityofpreventingovereating.DAsongcombineswordsandmusic,yetthehumanbraincaninstantlyseparateasong'swordsfromitsmusiccontent.Andnowscientiststhinktheyknowhowithappens.AteamledbyresearchersatMcGillUniversityreportedinSciencethatsongsoundsareprocessedatthesametimebytwoseparatebrainareas—oneinthelefthemisphere(大脑半球)andoneintheright.“Ontheleftsideyoucanfigureoutthespeechcontentbutnotthemusiccontent,andontherightsideyoucanfigureoutthemusiccontentbutnotthespeechcontent，”saysRobertZatorre,aprofessoratMcGillUniversity.“Thankstosongbirds,wegotthefindingofourresearch，”Zatorresays.“Inapreviousstudyofsongbirds,wefoundthattheirbrainsfigureoutsoundsusingtwoseparatemeasures.Oneassesseshowquicklyasoundfluctuates(起伏)overtime.Theotherdetectsthefrequenciesinasound.Wethought,hey,maybethatiswhatthehumanbraindoes,too.”Tofindout,theteamgothelpfromacomposerandasingerwithhighsingingvoice.Andafteraseriesofexperiments,itturnedoutthathumansdecodesoundsthesamewayassongbirdsdo,byseparatingasound'stime­relatedelementsfromthefrequenciesitcontains,andprocessingtheinformationusingtwodifferentgroupsofspecializedbraincells.“Asaresult,whenwehearasong,itengagesbothhemispheresofthebraininawaythat'sdifferentthaneitherspeechormusicalone？”Zatorresays.Thefindingexplainssomethingdoctorshaveobservedinstroke(中风)patientsfordecades,saysDanielaSammler,aresearcherattheMaxPlanckInstituteinLeipzig,Germany,whowasnotinvolvedinthestudy.“Ifyouhaveastrokeinthelefthemisphereyouaremuchmorelikelytohavealanguagebarrierthanifyouhaveastrokeintherighthemisphere？”Sammlersays.Moreover,braindamagetocertainareasoftherighthemispherecanaffectaperson'sabilitytosensemusic.12．Whatdoestheunderlinedword“it”inParagraph1referto?A.Thebrain'sdistinguishinglyricsofasongfromitsmelody.B.Thecooperationbetweenleftandrighthemisphere.C.Thepopularityofmusicaroundtheworld.D.Asong'scombiningwordsandmusic.13．Whyaresongbirdsmentionedinthetext?A.Toshowtherelationshipbetweenleftandrighthemisphere.B.Topresentthebackgroundofdoingthestudy.C.Tointroducethewaysongbirdsfigureoutsounds.D.Toillustratethefindingofthestudy.14．What'sSammler'sattitudetowardsthefinding?A.Doubtful. B．Supportive.C.Disapproving. D．Uncaring.15．Whatisthetextmainlyabout?A.Theprocessofourbrains'dealingwithinformation.B.Differentfunctionsofourbrain'stwohemispheres.C.Reasonswhysomanypeoplelovetolistentomusic.D.Thewayourbrainworkswhenlisteningtoasong.Ⅱ.阅读七选五Beingstuckathomemightnothavebeenonyouragendaforthecurrentmoment.__16__Buthometimecanbequalitytime,anopportunitytorest,restoreandre­energize.Herearefourtipstohelpyoustartfeelingpositiveaboutbeing“stuck”athome.Makeaschedule.Itcanbedestabilizingtobestuckinyourhomewhenyou'reaccustomedtoorganizingyourdayaroundvariouscomingsandgoings—towork,tosocialgatherings,etc.Thinkaboutwaystomakeascheduletohelpnormalizeyourhometime.Trytokeeptomealandsnacktimes.__17__—AndmakeaplanforhowmuchtimeyouwillspendworkingorsurfingtheInternet.__18__There'snomorereliablewaytotransportyourselftootherplaces,mindsetsandmoodsthantoreadaninterestingbook.Whetheryouchooseanoldfavoritenovelorabrandnewbook,readingforpleasureisaboundlesssourceofrelaxationandjoy.Pickupthephoneandtalk.Manypeople'spleasureofaphoneconversationoftengetslostnowadays.Beingstuckathomeprovidestheperfectopportunitytorestoreyourphonechattingskills.Reachouttoafriendorfamilymember—eitheroneyoudon'toftengettosee,oronewholivesdownthestreet.__19__Startaproject.Startingaprojectisawaytomakeyourtimeathomefeelmeaningfulandproductive.Solookaroundyourhouseandidentifyaprojectthatneedsdoing.__20__Youcanalsogrowpotsofflowersinyourlivingroom.A.Readforfun.B.Howwillyoupassthetime?C.Startingaprojectcanbesimple.D.Anditmightnothavebeenyourdecision.E.Forexample,repairachairinyourbasement.F.Haveageneralroutinearoundwakingupandgoingtosleep.G.Inthisway,youcanstillstayconnectedwithotherswhenbeingathome.

选择性必修第二册Unit3同步练习(限时：35分钟)Ⅰ.阅读理解ABrisbaneisanexcitingcity,votedasoneofthemostliveablecitiesinAustralia.Itsfinefoodwillmakeyouhatetoleave.Herearefourfamousrestaurants.KingsleysSteak&CrabHouseLocatedonthewaterfrontoftheBrisbaneRiverwithviewsoftheStoryBridge,KingsleysSteak&CrabHousesuppliesanincomparableidealsettingforlunchordinner.Withimpressiveviewsandacombinationofbothindoorandoutdoorseating,itattractsalotoftouriststohaveauniquediningexperiencehere.Italsooffersfreshseafood,includingAlaskakingcrabs,high­gradewineandfriendlystaff.Ratesperperson:$35—$45MooMooTheWineBarMooMooTheWineBarisanaward­winningchainoflakesidediningsites.Originally,itwasfoundedin2005byStevenAdams,awell­knownchef.MooMoohassinceclaimedmanyawards,includingQueensland'sBestSteakRestaurant2008,GoldRiversideRestaurantoftheYear2007,andGoldCoast'sBestSteakRestaurant.Ratesperperson:$40－$45JellyfishRestaurantThebeautifulviewsovertheBrisbaneRiverarejustastartertocomefromJellyfishRestaurant.Itsaimistosourceandservefishesof8speciesdaily,tolearnandunderstandthetextureandqualitiesofeachspeciesandrecommendthebestwaytocooktoitscustomersandserveforthefineexperience.Ratesperperson:$30－$45TibetianKitchenForafinediningexperienceinBrisbane,itishardtogopastTibetianKitchenfoundedbytheaward­winningwell­knownchefMattMoran.WithabeautifulsettingonthebankoftheBrisbaneRiver,TibetianKitchenisallaboutbeautifullypresenteddisheswhichlooklikepiecesofperfectartwork.ThisiswhatTibetianKitchendiffersfromotherrestaurantsabove.Ratesperperson:$35－$45语篇解读：本文是一篇应用文。文章介绍了澳大利亚城市布里斯班的四个有名的餐馆。1.WhatmakesKingsleysSteak&CrabHouseattractivetotourists?A.Itsgreatseafood.B.Itsfriendlyservice.C.Itshigh­gradewine.D.Itsbeautifuldiningsurroundings.解析：选D细节理解题。根据KingsleysSteak&CrabHouse部分中的“Withimpressiveviews...uniquediningexperiencehere.”可知，该餐馆因其优美的用餐环境吸引了不少游客。2．Whichwillyouchooseifyouintendtolearnsomecookingskills?A.KingsleysSteak&CrabHouse.B.MooMooTheWineBar.C.JellyfishRestaurant.D.TibetianKitchen.解析：选C细节理解题。根据JellyfishRestaurant部分中的“Itsaimis...recommendthebestwaytocooktoitscustomers”可知，想要学一些烹饪技术的顾客可选择该餐馆。3．HowisTibetianKitchendifferentfromotherrestaurantsmentionedinthetext?A.Itsenvironmentiselegant.B.Itsfoodratesaremuchlower.C.Itschefshavewonmanyawards.D.Itsfoodpresentationisratherpleasing.解析：选D细节理解题。根据TibetianKitchen部分中的“TibetianKitchenisall...piecesofperfectartwork...differsfromotherrestaurants”可知，该餐馆与众不同之处在于菜品精致的摆盘。BMalinPinskyhadthefirstoftwolightbulbmomentsin2003whilecrossingDrakePassage.Hewasthenstandingonthebridgeofaresearchshipandwasscanningtheskyforseabirds,whichwasoneofhisdutiesasaresearchtechnicianonthecruise(海上航游).Justfivemonthsearlierhehadfinishedcollege,wherehestudiedbiologyandenvironmentalscience.Astheshipenterednutrient­richAntarcticwaters,whalessuddenlyshowedupallaroundtheship.Thatmomentonthebridgehelpedhimrealizethattheoceanlooksfeaturelessfromthetop,butthere'ssomuchgoingonunderneath.Thesecondlightbulbmomenthithimseveralmonthslater.Pinskywasthenanintern(实习生)inWashington，D.C.Hisjobwasmakingphotocopies.Itwasaroundthetimewhentwobigreportshadcomeout.BothfocusedonwhatpoliciesmightbestpreserveU．S.oceanresources.“Irealizedwehavealltheselawsandpoliciesthatdeterminehowweasasocietyinteractwiththeocean.Butthey'refaroutofdate.Wedon'tyethavethesciencetoknowwhatthenewpolicyshouldbe，”Pinskysaid.Todayherunsalabwithabout20workers.Histeamwantstoseekhowourchangingclimate,aswellasoverfishingandhabitatdestruction,mightbedrivingchangesinfishandotheranimalsinthesea.Tofindout,teammemberstraveleachyeartocoralreefsnearthePhilippines.There,theycarefullycatalogpopulationsofdifferentfish.Theycollectdataonthegrowthandmatingofthesefish,theirdiversityandotherfactors.“Pinsky'sbroadapproachtotheproblem—lookingatspecies,wheretheyliveandhowfisheriesaremanaged—issettingthepaceforotherscientists，”saysKimberlyOremus,afisheryeconomistattheUniversityofDelawareinNewark.“Pinskyispushingthewholefieldtorespondtohisgrowingbodyofresearch.”语篇解读：本文是一篇叙事类报道。文章主要讲述了海洋生态学家MarlinPinsky在两次突然醒悟的瞬间之后，带领着一个20人的团队致力于海洋生态环境的研究。4．WhatmadePinskyhavethefirstlightbulbmoment?A.Thevastnessoftheocean.B.Thesightofseabirdsinthesky.C.TheviewofDrakePassage.D.Theappearanceofwhalesaroundtheship.解析：选D细节理解题。根据第二段中的“whalessuddenlyshowedupallaroundtheship...butthere'ssomuchgoingonunderneath”可知，出现在船周围的鲸鱼让Pinsky有了第一次突然醒悟的瞬间。5．WhatdidPinskyrealizewhenhewasaninterninWashington,D．C.?A.Heneededtotakemorephotosofoceans.B.Heshoulddosomethingtoupdateoceanpolicies.C.TheU．S.oceanresourcesneedtobebetterpreserved.D.Therehavealreadybeenperfectpoliciestopreservetheocean.解析：选B推理判断题。根据第三段中的Pinsky所说的“Irealizedwehavealltheselaws...Butthey'refaroutofdate...”及后文内容可知，Pinsky那时意识到现在还没有新的科学依据来帮助制定新的海洋政策，他觉得他可以有所作为。6．WhatdoesPinsky'steamfocuson?A.Theharmofoverfishing.B.Featuresofdifferentfish.C.Factorsaffectingoceanecosystems.D.Thereasonsforglobalwarming.解析：选C细节理解题。根据第四段中的“Histeamwantstoseekhowourchangingclimate...changesinfishandotheranimalsinthesea.”可知，Pinsky的团队主要关注影响海洋环境的因素。7．What'sKimberlyOremus'attitudetowardsPinsky'sresearch?A.Positive. B．Doubtful.C.Disapproving. D．Uninterested.解析：选A观点态度题。根据最后一段中“...issettingthepaceforotherscientists”及“Pinskyispushingthewholefieldtorespondtohisgrowingbodyofresearch.”可知，KimberlyOremus对Pinsky的研究持肯定态度。CYou'reonadiet,butthesmellofpopcorninthemovietheaterlobbybringsyouaseeminglyirresistibledesire.Withinseconds,you'veorderedatubofthestuffandhaveeatenseveralhandfuls.Foodimpulsivity(冲动性),whichhasbeenlinkedtoexcessivefoodintake,mayleadtomanyhealthproblems,suchasweightgainorobesity.However,ateamofresearchershasnowidentifiedaspecificcircuitinthebrainthatinfluencesfoodimpulsivity,creatingthepossibilitythatscientistscansomedaydeveloptherapyforovereating.“Yourbrainhaspotentialabilitytorepelimpulsiveeating，”saidEmilyNoble,anassistantprofessorintheUGACollegeofFamily.“Inexperimentalmodels,youcanactivatethatcircuitryandgetaspecificbehavioralresponse.”Usingaratmodel,researchersfocusedonagroupofbraincellsthatproduceatypeoftransmitterinthehypothalamus(下丘脑)calledMCH.“WhilepreviousresearchhasshownthatelevatingMCHlevelsinthebraincanincreasefoodintake,thisstudyisthefirsttoshowthatitalsoplaysaroleinimpulsivebehavior，”Noblesaid.Totestimpulsivity,researcherstrainedratstopressalever(杠杆)toreceivea“delicious,high­fat,high­sugar”button,Noblesaid.However,therathadtowait20secondsbetweenleverpresses.Iftheratpressedthelevertoosoon,ithadtowaitanadditional20seconds.ResearchersthenusedadvancedtechniquestoactivateaspecificMCHneural(神经的)pathwayfromthehypothalamustothehippocampus,apartofthebraininvolvedwithlearningandmemoryfunction.ResultsindicatedMCHdoesn'taffecthowmuchtheanimalslikedthefoodorhowhardtheywerewillingtoworkforthefood.Rather,itactedontheanimals'abilitytostopthemselvesfromtryingtogetthefood.ActivatingthisspecificpathwayofMCHneuronscontrolledimpulsivebehaviorwithoutaffectingnormaleatingforcaloricneedormotivationtoconsumedeliciousfood.Thisopensthedoortothepossibilitythatonedaywemightbeabletodevelopanewtreatmentforovereatingthathelpspeoplesticktoadietwithoutreducingnormalappetiteormakingdeliciousfoodslessdelicious.语篇解读：本文是一篇说明文。文章主要介绍了Noble研究小组对关于大脑中改变进食冲动的一个特定回路的新发现。他们预计未来有可能研究出在不降低正常食欲的前提下解决暴饮暴食的治疗方法。8.Theauthorusesanexampleatthebeginningofthetextto________．A.introducethetopicB.describeone'scharacterC.presentanargumentD.clarifythewritingpurpose解析：选A推理判断题。第一段列举了一个冲动进食的具体示例，由后文内容可知，其目的是引出话题。9．Whatdoestheunderlinedword“repel”inParagraph3probablymean?A.Cause. B．Refuse.C.Choose. D．Confirm.解析：选B词义猜测题。根据第二段中“ateamofresearchershasnowidentifiedaspecificcircuit...therapyforovereating.”及最后一段中“ActivatingthisspecificpathwayofMCHneuronscontrolledimpulsivebehavior”可推断，我们的大脑有潜力拒绝冲动饮食，故画线词词义与B项相近。10．Whatdotheresearcherswanttofindthroughtheratexperiment?A.HowtoincreasetheMCHlevels.B.Whatfactorscausefoodimpulsivity.C.WhetherMCHisrelatedtoimpulsiveeating.D.Whetherthenewtherapywillinfluencenormaleating.解析：选C推理判断题。根据第五段中“Totestimpulsivity”及研究结果可知，研究人员想通过大鼠试验来确定MCH是否与冲动进食有关联。11．What'sthelastparagraphmainlyabout?A.Thesignificanceofthestudy.B.Thefurtherresearchonovereating.C.Theimportanceofstickingtoadiet.D.Thepossibilityofpreventingovereating.解析：选A段落大意题。根据最后一段内容尤其是“Thisopensthedoortothepossibilitythatonedaywemightbeabletodevelopanewtreatmentforovereating”可知，本段主要介绍了这项研究的意义在于它可能有助于找到治疗暴饮暴食的有效方法。DAsongcombineswordsandmusic,yetthehumanbraincaninstantlyseparateasong'swordsfromitsmusiccontent.Andnowscientiststhinktheyknowhowithappens.AteamledbyresearchersatMcGillUniversityreportedinSciencethatsongsoundsareprocessedatthesametimebytwoseparatebrainareas—oneinthelefthemisphere(大脑半球)andoneintheright.“Ontheleftsideyoucanfigureoutthespeechcontentbutnotthemusiccontent,andontherightsideyoucanfigureoutthemusiccontentbutnotthespeechcontent，”saysRobertZatorre,aprofessoratMcGillUniversity.“Thankstosongbirds,wegotthefindingofourresearch，”Zatorresays.“Inapreviousstudyofsongbirds,wefoundthattheirbrainsfigureoutsoundsusingtwoseparatemeasures.Oneassesseshowquicklyasoundfluctuates(起伏)overtime.Theotherdetectsthefrequenciesinasound.Wethought,hey,maybethatiswhatthehumanbraindoes,too.”Tofindout,theteamgothelpfromacomposerandasingerwithhighsingingvoice.Andafteraseriesofexperiments,itturnedoutthathumansdecodesoundsthesamewayassongbirdsdo,byseparatingasound'stime­relatedelementsfromthefrequenciesitcontains,andprocessingtheinformationusingtwodifferentgroupsofspecializedbraincells.“Asaresult,whenwehearasong,itengagesbothhemispheresofthebraininawaythat'sdifferentthaneitherspeechormusicalone？”Zatorresays.Thefindingexplainssomethingdoctorshaveobservedinstroke(中风)patientsfordecades,saysDanielaSammler,aresearcherattheMaxPlanckInstituteinLeipzig,Germany,whowasnotinvolvedinthestudy.“Ifyouhaveastrokeinthelefthemisphereyouaremuchmorelikelytohavealanguagebarrierthanifyouhaveastrokeintherighthemisphere？”Sammlersays.Moreover,braindamagetocertainareasoftherighthemispherecanaffectaperson'sabilitytosensemusic.语篇解读：本文是一篇说明文。麦吉尔大学的研究揭示了人们在听音乐时，大脑如何立即将歌曲的歌词与旋律分离开来。12．Whatdoestheunderlinedword“it”inParagraph1referto?A.Thebrain'sdistinguishinglyricsofasongfromitsmelody.B.Thecooperationbetweenleftandrighthemisphere.C.Thepopularityofmusicaroundtheworld.D.Asong'scombiningwordsandmusic.解析：选A代词指代题。根据画线词前的“thehumanbraincaninstantlyseparateasong'swordsfromitsmusiccontent”及下文内容可知，科学家发现了大脑是如何将歌曲的歌词和旋律分离开的，所以it指代的是这个情况。13．Whyaresongbirdsmentionedinthetext?A.Toshowtherelationshipbetweenleftandrighthemisphere.B.Topresentthebackgroundofdoingthestudy.C.Tointroducethewaysongbirdsfigureoutsounds.D.Toillustratethefindingofthestudy.解析：选B推理判断题。根据第三段中“Inapreviousstu