英语国家概况-美国.ppt

文档介绍：(borderingneighbors)States(thesmallest&thelargeststate)SizeandLocationInthecentralpartofNorthAmerica(exceptAlaskaandHawaii)CanadaonthenorthMexicoandtheGulfofMexicoonthesouthAtlanticOceanontheeastPacificOceanonthewesttotalarea—;Thewholecountryincludes50statesandafederaldistrict,theDistrictofColumbia——thelargest(1717,854sqkm)RhodeIsland—thesmallestTexas—thelargestonthemainland(695,621sqkm)—thehighlandsformedbytheAppalachianRange(阿巴拉挈亚山系).onesixthofthenationalterritoryrelativelylow,withanaveragealtitudeof800metersabovesealevel