Unit2CrossingLimitsUnit2CrossingLimitsWarming-up&ListeningWarming-up&ListeningThemapoftheworld•Howmanycontinentsarethereintheworld?Whataretheirnames?AsiaAfricaEuropeNorthAmericaSouthAmericaOceaniaAntarcticaAsianAfricanEuropeanAmericanOceanianAntarcticZhengHeChristopherColumbusJamesCookAbelTasmanZhengHeanavigatorbetween(1405—1433),made7voyagestoTheIndianOcean,visited30countriesandregions,theRedSeaChristopherColumbusASpanishexplorer,completed4voyagestothewestandreachedNorthAmerica,butatthattimeheinsisteduntilhediedthatthelandhereachedwasanunknownpartofAsiaJamesCookAnexplorer,toexplorethePacificOcean,3voyagesaroundtheworld,visitedhundredsofislands,includingAustralia,NewZealand,HawaiiandNorthAmerica,mademapsofthemAbelTasmanThediscoveryofNewZealandAbelTasmanHolland1603–1659ThefirstEuropeantodiscoverNewZealanddangersandchallengesinexplorationhitarock,meetwithstorms,Windsandwavesonthesea,losingtheirway,fightagainstthenatives,lackoffoodanddrinkingwater,pirates(海盗)...ListeningAnswerstoexercise2pastpresentCommunicationTransportDiscoveriesweren’tpublisheduntilatleastayearlaterHorseandcamels;peoplecarryallsupplies;noroadsandnomaps;dangerousanddifficult;tinyshipsmobilephones;InternetCarsandtruckstocarryallsupplies;aeroplanesandhelicopters;fastandsafe3.Listentothetapeandanswerthefollowingquestions.1.Whatweresomeoftherisksthatexplorershadtofaceinthepast?2.Howdomodernexploresdealwiththeproblemofhavingnomaps?3.InwhichwaywillahumantriptoMarsbesimilartothetripsofexplorersinthepast?Losingtheway,runningoutofsupplies,hurtbypoisonoussnakes,dangerousanimals,terriblediseases,oreveneatenbypeople.Theywouldusetelescopes,aeroplanesorhelicopterstosurveythearea,askingotherscientistsforhelpusingmobilephonesandtheInternet.Explorersmusttakeenoughfood,drinkandmedicineforthetrip.Therewillbenoroadsandnomaps,andtheremaybeunknowndangers.speakingspeaking1.Intheirwork,scientistsmeetwithsituationsaboutwhichtheyhavetomakedecisions.meetwith…,comeacross…comeupwith…,runinto…遇到,碰上makedecisionsabout….对…作出决定aboutwhich…在句中引导一带有介词的定语从句,修饰先行词situations2.WhenCaptainJamesCooklandedin…,hetookpossessionofitinthenameoftheBritishCrown..1)sbtake/get/gainpossessionof…把…占为己有,占领,夺取sbbeinpossessionofsthDon’ttakepossessionofthewallet,thoughyoupickeditupinthestreet.2)sthbeinthepossessionofsb（某物）为（某人）所有Therarestampisinthepossessionofanunknowncollector.inchargeof/inthechargeof①Youcan’t___it,whichbelongstoher.A.takethepossessionofB.takepossessionofC.takechargeofD.taketheplaceofB2.inthenameof…以…名义,代表…,看在…上Thepolicearrestedhiminthenameofthelaw.Inthenameoflove,stopit.Letmethankyouinthenameofusall.让我代表大家感谢你.innameonlyby／of/underthenameof,callone’snamesnameafter只在名义上Eg.Theboy____thenameofDavidisnamed____hisgrandfather.A.in;afterB.by;withC.in;byD.by;afterD名叫……的骂人以．．．．命名1．massesof大量的amassofsand/snow一堆/团/块2.berich/poorin富含/缺乏MorePhrases:1．doresearchon进行调查2.astatekeyproject一项国家重点项目3.digup挖掘1.riskone’slife/healthtodosth冒丧失生命，健康之险做某事2.doobservationsfor…为…去做观察3.Insteadofsendingpeople,wecansendrobotsequippedwith….insteadof…代替,而不是e.g.Insteadofgoingtothemuseum,theyfinallydecidedtogotothepark.equippedwith…“装备”,过去分词短语作定语equip…with….,beequippedwith….e.g.Allthepoliceareequippedwithgunsandbullets.equipmentn.设备,配置
