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1、Chapter1GeographyI.LocationandSize1.ThefullnameoftheUnitedStatesistheUnitedStatesofAmerica.ThecontinentalUnitedStatesliesincentralNorthAmericawithCanadatoitsnorth,MexicoandtheGulfofMexicotoitssouth,theAtlanticOceantoitseastandthePacificOceantoitswest.2.
2、TheU.S.hasalandareaof9.3millionsquarekilometers.ItistheforthlargestcountryintheworldinsizeafterRussia,CanadaandChina.3.TheU.S.isafederalrepublicwithmanystates.1)Foralongtimetherewere48states,thenin1959AlaskaandHawaiibecametheforty-ninthandfiftiethstates
3、.AlaskabordersonnorthwesternCanada,andHawaiiliesinthecentralPacific.2)Ofallthestates,AlaskaisthelargestinareaandRhodeIslandisthesmallest.ButonthemainlandTexasisthelargestsateofthecountry.II.Mountains,RiversandLakes1.Mountains:1)TheRockies(落基山脉),thebackb
4、oneoftheNorthAmericanContinent,isalsoknownastheContinentalDivide.2)ThetwomainmountainrangesinAmericanaretheAppalachianmountainsandtheRockymountains.TheAppalachiansrunslightlyfromthenortheasttosouthwestandtheRockyMountainsrunslightlyfromthenorthwesttosou
5、theast.2.Rivers1)TheMississippiRiveristhelargestriverinAmerican,over6000kilometers.TheMississippihasbeencalled“fatherofwaters”or“OldManRiver”.2)TheOhioRiverhasbeencalledtheAmericanRuhr.Theareaalongtheriverisrichinvaluabledepositsofhigh-gradecokingcoalan
6、diswellknownforitssteelindustry.Theriverprovidescheapwatertransportationforrawmaterials.3)OnthePacificsidetherearetwogreatrivers:theColoradointhesouthandtheColumbia,whichrisesinCanada.4)TheRioGrandeRiverformsanaturalboundarybetweenMexicoandtheUnitedStat
7、es.3.Lakes:ThemostimportantlakesintheUnitedStatesaretheGreatLakes.TheyareLakeSuperior,whichisthelargestfreshwaterlakeintheworld,LakeMichigan,theonlyentirelyintheU.S.,LakeHuron,LakeErieandLakeOntario.TheyarelocatedbetweenCanadaandtheUnitedStatesexceptLak
8、eMichigan.III.Climate1.Ahumidcontinentalclimate(湿润的大陆性气候）isfoundinthenorth-easternpartofthecountry.2.Inthesouth-easternUnitedStatesyoucanfindahumidsubtropicalclimate.(湿润的亚热带气候）3.ThePacificnorthwestisfavoredwithamaritimeclimate(海洋
