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高中英语Unit2Sailingtheoceans-Listening课件新人教选修9课件.ppt

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Listening1.Readthesewordsandthenlistentothetape.Circlethoseaidsthatearlysailorsusedtofindtheirway.2.Listentothetapeagainandfillinthechart.3.ThesearesomeVikingsailingdirectionsfromNorwaytoGreenland.KeepsouthofIcelandsothatyoucannotseelandbutjustcoastalbirds. FollowthisrouteandyoushouldreachGreenland.Usetheinformationfromthelisteningtoexplainthesesailingstrategies.LISTENINGTEXTNAVIGATIONALSECRETS WangMing(WM)hascometotheMaritimeMuseuminGreenwichtotalktothenavalhistorianDrSmith (DS).WM:Thankyousomuchfortalking tome.Pleasecanyoutellme howsailorsmanagedbefore navigationalinstrumentsor satelliteswereinvented? DS:Ofcourse.Atfirstiftherewasno landnearbytheseamenusedthe skytofindtheirway.Theylookedatthecloudsinthedaytimeandthestarsatnight.Butverysoontheybegantodeveloplocalmaps.About5,000yearsagosailorsfromPhoeniciainNorthAfricausedsimplemapstoguidetheirshipsaroundtheMediterraneanSea.Theywerethebesttradersoftheirday.WM:Really?Howcleaver!Did everybodyusesimplemaps? DS:No.I'mafraidnot.Itwas difficulttohaveamapforsailing acrossopenseathen.Weknow theVikingsfromNorwayhadno writtenmapswhentheysailed acrosstheNorthSea.WM:TheVikings?Didn'ttheysail aroundandattackpeopleand townsfromtheirships? DS:Sometimes.Butwe'renot interestedinthat,onlyintheir superiorsailingability. WM:Isee!Sowhatdidtheydo? DS:Well,oneofthethingstheydid wasconcentrateonwatchingbirds.There'sthestoryofaVikingcalledRaven-Floki.Heusedtokeepbirdsonhisshipsbuthedidn'tfeedthem.Thenwhenhethoughtlandwasnearhe'dletthebirdsgoandiftheyflewstraighttoland,allhehadtodowastofollowthem!WM:Didhefindanynewlandsto liveon? DS:Well,hedidfindagoodwayof sailingfromtheFaroeIslandsto Icelandusinghisravens.It’ssaid thathetookthreebirdsonhis shipwithhim.Whenhe’dbeen sailingforadayortwotowards Icelandheletthefirstbirdgo.ItflewbacktotheFaroeIslands.Adayafterthisheletthesecondbirdgo.Thisflewoutofsightbutcamebacktorestontheship.Sometimeafterthat,heletthethirdbirdgo.ItheadedstraightforIcelandsoRaven-Flokifolloweditandarrivedtheresafely.WM:Thatsou