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高中英语 Sailing the oceansListening课件 新人教选修9.ppt

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Listening1.Readthesewordsandthenlistentothetape.Circlethoseaidsthatearlysailorsusedtofindtheirway.2.Listentothetapeagainandfillinthechart.3.ThesearesomeVikingsailingdirectionsfromNorwaytoGreenland.KeepsouthofIcelandsothatyoucannotseelandbutjustcoastalbirds.FollowthisrouteandyoushouldreachGreenland.Usetheinformationfromthelisteningtoexplainthesesailingstrategies.LISTENINGTEXTNAVIGATIONALSECRETSWangMing(WM)hascometotheMaritimeMuseuminGreenwichtotalktothenavalhistorianDrSmith(DS).WM:Thankyousomuchfortalkingtome.Pleasecanyoutellmehowsailorsmanagedbeforenavigationalinstrumentsorsatelliteswereinvented?DS:Ofcourse.Atfirstiftherewasnolandnearbytheseamenusedtheskytofindtheirway.Theylookedatthecloudsinthedaytimeandthestarsatnight.Butverysoontheybegantodeveloplocalmaps.About5000yearsagosailorsfromPhoeniciainNorthAfricausedsimplemapstoguidetheirshipsaroundtheMediterraneanSea.Theywerethebesttradersoftheirday.WM:Really?Howcleaver!Dideverybodyusesimplemaps?DS:No.I'mafraidnot.Itwasdifficulttohaveamapforsailingacrossopenseathen.WeknowtheVikingsfromNorwayhadnowrittenmapswhentheysailedacrosstheNorthSea.WM:TheVikings?Didn'ttheysailaroundandattackpeopleandtownsfromtheirships?DS:Sometimes.Butwe'renotinterestedinthatonlyintheirsuperiorsailingability.WM:Isee!Sowhatdidtheydo?DS:Welloneofthethingstheydidwasconcentrateonwatchingbirds.There'sthestoryofaVikingcalledRaven-Floki.Heusedtokeepbirdsonhisshipsbuthedidn'tfeedthem.Thenwhenhethoughtlandwasnearhe'dletthebirdsgoandifthey