unit2reading课件
日期：2010-10-14 10:06
andsailedaroundtheworldtwiceCaptainCooksvoyagesleadtotheestablishmentofcoloniesthroughoutthePacificbyseveralEuropeancountriesHeisconsideredoneoftheworldsgreatestexplorersCookwasthefirstshipcommandertopreventtheoutbreakofscurvy(坏血病)，PersianGulfanddistantAfricainsevenepicvoyagesfrom1405to1433，some80yearsbeforeColumbussvoyages(ColumbussailedtoAmericainStMaria(eighty-fivefeet)in1492)ZhengHeflag"treasureship"isfourhundredfeetlong-muchlargerthanColumbuss Inthedrawingabove，thetwoflagshipsaresuperimposedtogiveaclearideaoftherelativesizeofthesetwoshipsJamesCook BritishNavigatorandExplorer 1728-1779 JamesCookcommandedthreevoyagesofdiscoveryforGreatBritain，Unit2CrossinglimitsWorldmapexplorationWarmingupQuiz1whowasthefirstpersonthatmappedtheIndiancoast?2Whowasthefirstpersonthatdiscoveredthe“NewWorld”?ZhengHesailedfromChinatomanyplacesthroughoutSouthPacific，Taiwan，IndianOcean，byservinghiscrewfruitandsauerkrauttopreventthediseaseHebecamethefirsttocrosstheAn，
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