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1、Unit3TheIntroductionoftheUnitedStatesI.ABriefIntroductionTheUSAistheshortoftheUnitedStatesofAmerica.TheUSAismadeupof50states.ItisintheNorthAmerica.ItliesbetweenCanadaandMexico.ThetotalareaofAmericaisabout9.5millionsquareKilometers.Itisthefourthlargestcountryintheworld.Thereare
2、over300millionpeoplelivingtherenow.ThecapitaloftheUSAisWashington,D.C.NewYorkisthebiggestcity.TheofficiallanguageisEnglish.ItsNationalDayisonJuly4th.Americaisaveryyoungcountry.Itonlyhasabout200yearshistory.Itisthemostpowerfulcountryintheworldtoday.II.TheAmericanflagJNames:TheA
3、mericanflag,TheStarsandStripes;Red,WhiteandBlue;OldGlory;TheStar-SpangledBannerJUse:NationalflagandensignJProportion:10:19JAdopted:June14,1777(original13-starversion)JJuly4,1960(current50-starversion)JDesign:Thirteenhorizontalstripesalternatingredandwhite;inthecanton,50whitest
4、arsofalternatingnumbersofsixandfiveperrowonabluefieldIII.GreatSealoftheUnitedStatesJTheGreatSealoftheUnitedStatesisusedtoauthenticatecertaindocumentsissuedbytheUnitedStatesfederalgovernment.Thephraseisusedbothforthephysicalsealitself(whichiskeptbytheUnitedStatesSecretaryofStat
5、e),andmoregenerallyforthedesignimpresseduponit.TheGreatSealwasfirstusedpubliclyin1782.JTheobverseofthegreatsealisusedasthenationalcoatofarmsoftheUnitedStates.ItisofficiallyusedondocumentssuchasUnitedStatespassports,militaryinsignia,embassyplacards,andvariousflags.Asacoatofarms
6、,thedesignhasofficialcolors;thephysicalGreatSealitself,asaffixedtopaper,ismonochrome.IV.AmericanAnthem"TheStar-SpangledBanner"isthenationalanthemoftheUnitedStates.Thelyricscomefrom"DefenceofFortM'Henry",[1]apoemwrittenin1814bythe35-year-oldlawyerandamateurpoet,FrancisScottKey,
7、afterwitnessingthebombardmentofFortMcHenrybyBritishshipsoftheRoyalNavyinChesapeakeBayduringtheBattleofFortMcHenryintheWarof1812."TheStar-SpangledBanner"wasrecognizedforofficialusebytheNavyin1889,andbyPresidentWoodrowWilsonin1916,andwasmadethenationalanthembyacongressionalresol
8、utiononMarch3,1931(46Stat.1508,codifiedat36U.S.C.§301),whichw
