美国概况(英文版)ppt课件.ppt

American situation The United States on July 4,1776,independent,rely on north American advantageous natural conditions and continuous outward expansion of its territory,and after a century of time capitalist economy of rapid development,now has a monopoly capitalism highly developed countries in the world today,is also abundant economic strength and productivity level highly developed capitalist countries.n The United States of America,the abbreviation of the United States.U.S.A.The United States the country is divided into fifty states and a special economic zone,says Columbia,namely of District then to Washington,D.C.is located.Among them there are 48 states in domestic,and two other overseas state,which is located in the north American continent northwest Alaska)and is located in Alaska(in the northern Pacific Ocean of Hawaii.In addition,there are some American territory and trust.The land covers an area of 937.1 square kilometers,after the former Soviet union,Canada and China,ranked fourth place.nAmericas population have 2.49 by billion(1990 American officials,including digital)migrates from European countries the white 21,100 million seed,accounting for approximately 85%,black 2,650 million,accounted for about 11%,indians 1.3 million,Mexico clansman 6.6 million,Puerto Rican 180 million.The Chinese in the United States about 900,000 people.n English is the most of the mandarin,English is spoken residents,including black inside.But there are also some peoples used other languages,such as indians to speak American Indian language,Mexico clansman speaks Spanish,other countries the children of immigrants many still speak their own national languagen American religious beliefs is extremely common in every 100 americans,about 60 people are Christian church or other religious group members.Some dont belong to any church,a largely religious beliefs.Self-proclaimed man without religion is about 3%.American religious factions also many,the national have 253 a religious sect,a total of 33.3 million local church groups.Christians have the greatest number 7,200 million catholics 4,800 million,jewish 611.5 million,orthodox christians are there.The world 374 million people in the United States,some major religious believers,are such as Islam,Buddhism,Russian orthodox and Greek orthodox,etc.Natural geographicaln The main part of the homeland in the central North America,the east coast in the west Pacific,Atlantic ocean,with 49 north latitude.And five great lakes and Canada as a border,NaLian Mexico,southeast gulf and the west Indies between distantly faces.Native and Chinas latitude basic same,belong to the north temperate zone,reason climate and China also have similarities,in addition to coastal areas outside,majority is in hot summer and cold winter of continental climate.The United States&Natural ConditionsnPosition and area nSurface Regions and landforms nClimate&weather nLand ResoursenRivers&Lakes nForests nMineral Resourses terrainRockiesnRocky Mountains from the northern New Mexico,after Canada extended to Alaska.This tall mountain ranges form the backbone of the North American continent,and the Great Dividing Range is across the Rocky Mountains.This is a watershed in the Pacific and the Atlantic Ocean.landnU.S.land can be divided into seven main areas:(1)Appalachia(2)the coastal lowland,(3)Central Plains Region,(4)Ozark Mountains,(5)Rocky Mountains,(6)western grasslands,basin,(7)Pacific coast lowlands.The Appalachian mountainsnAppalachian Mountains and was parallel to the direction of the Atlantic coast from north to south,up to 2,000 kilometers.The average height of only 800 meters and a width of 200-300 km.The Appalachian Mountains and the Atlantic coast,forming a low-lying Atlantic coast.Here are a few originate in the Atlantic Appalachian rivers flow,such as the Connecticut River(Connecticut River),Hudson River(Hudson River),Sasikuiha that river(Susquehanna River),Potomac River(Potomac Riv nCordillera Cordillera mountain is the Rocky Mountains,Cascade Mountains,Sierra Nevada and coastal mountain ranges of the composition.Entrenched in the mountains almost the entire western United States,1,700 km wide in some areas.The mountainous area of u200bu200beastern Rocky Mountains,west of the Cascade Mountains,the Sierra Nevada and coastal mountain ranges along the Pacific coast.nIn the Rocky Mountains and the Cascade,Sierra Nevada Mountains,separated by plateaus and basins.Bordering the north and one in Canada is British Columbia Plateau,the middle is the Great Basin,southeast of the Colorado Plateau.nThe grand canyon is here,now bi grand canyon national park,is also a recreational area.n Rivers,lakes n The Mississippi River is the main rivers,is also the largest river in North America,the Missouri river is the source,the span 6,262 kilometers,is one of the longest rivers in the world from Central America,the great plains it into the gulf of Mexico to the south.nIt because the Missouri river yamuxing devotes herself,the Ohio river and size of more than 40 tributary,so abundant water quantity.n Native American frontier with 4 international rivers on the northeast frontier the St.Lawrence River,the northwest frontier bolles,Columbia River,southwest frontier r.the Rio Grande grid lang Rio Grande River and the Colorado River.The first two river and Canada,with two river and Mexico after total.Now the United States and Mexico were about 3,200 kilometers long,the lattice lang Rio grande river together the two countries on the river irrigation and flood control facilities construction,that both countries are beneficial.Five great lakesnFrom west to east ordinal it is lake superior,lake Michigan,lake Huron receives,YiLiHu and Ontario;Between each lake Ontario interlinked,finally through waterway,which the st.Lawrence river by into the Atlantic oceannIn addition to lake Michigan,both of the United States for more than outside the United States and Canada were,as the worlds largest freshwater lakes area,has the America continent Mediterranean,said.nThe lake from west to east stepping down,such as higher YiLiHu lake Ontario about 100 meters and so on contact of dongting Niagara river after completion,then prove for waterfalls,divide steep 50 meters,the width 1,240 meters,this is the famous Niagara Falls.n Kind of climate-except by latitude location affect outside,are also affected by different atmospheric circulation moist,western influence drought(eastern Pacific coast exception)nIn the great lakes region,and five northeast coast temperate climate,is influenced by labrador cold snap and influence,the winter cold north coolernThe southeastern United States and gulf coast subtropical climate,by huge Gulf Stream influence,warm and wet lush,plant growth.n。nThe United States is a continental climate in central plains,due to a lack of things to mountains,because this summer kept blowing into ink letter elder brother bay hot south,highest temperature of 40 degrees Celsius.And by the arctic cold winter air left unchallenged,since north cold and snowy,often reach-25-35.n n nThe western United States inland plateau arid,dry winter dry cold,summer heat.Pacific coast by Pacific subtropical high pressure because of winter and extratropical cyclone influence,more rain,warm summer cool little rain.n n n Arctic Alaska belong to the cold climate zone,climate is dry cold Hawaii located on the tropic of cancer,belong to the region south of tropical climates,n climaten And Arizona,California,Florida and Hawaii,also because winter of the temperate climate,tourism flourishing.Precipitation(rain,dissolve snow,the frost and the hail)distribution is uniform.n nThe United States national the wettest place is Hawaii kauai wei,average annual rainfall.Drew up mount 11,700 millimeter.nThe dry,the hottest place is Californias death valley and the average annual rainfall is even less than 50 millimeters,highest temperature was as high as 57.nThe U.S.minimum temperature records is,this is-62 in January 1971 in Alaska prologis pie bay shy of the record.Natural disastersnThe hurricane-such as Mexico coast in May to October each year from the attacks,to often agricultural causes great ndamagenBlizzard-in northern Rocky Mountains in winter cold season,also have attacks and blown over driving on the border of the train and cause casualty.n Coal-50 states have 36 states have coal resources for coal-fired power,about 50%of power is obtained by coal-fired power.Natural resources n America is a country rich in natural resources,and it is also the important energy superpower.Such as minerals,hydraulic and forest resources are relatively rich,coal,oil,natural gas,sylvite,phosphate,sulphur reserves are in the capitalist countries top,aluminum,copper,lead,tungsten,bismuth reserves.Its lack is nickel,tin,chromium,mn,co,diamond and some strategic materials.Iron oren Main distribution:1)the southwest area,the lake superior the region produces,accounted for iron ore three-quarters of the countrys total output.2)s second-largest iron mine near Birmingham)located in Birmingham(.3)in upstate New York,Pennsylvania and the Tennessee river basin all have iron ore distribution.n Non-ferrous metaln Main distribution:the southwest area of mountains and the rocky mountain Arizona,Utah,Montana,Nevada and new Mexico five states.Including Arizona copper ore production accounts for more than half of nationwide.nThe United States is lead reserves and productions biggest countries for the reserves 5,350 tons of lead,accounting for 36%of world.Lead distributed in Missouri(and the Rocky Mountains and the Appalachian mountains on both sides of the fourteen states.oilU.S.oil resources for 38.88 proven reserves tons(1978),the worlds reserves of 4.5%.Americas oil region mainly distributed:the southwest and the gulf coast,and especially concentrated in Texas,Louisiana and Oklahoma three states.Natural gas,water resources n Is capitalist world the country with the most natural gas output,but also consume most populous country.Therefore,still need to get gas from Canada and Mexico,and countries such as venezuela and Algeria in natural gas supply contract signed.n U.S.natural gas production base,roughly and oil region mainly distributed in the Texas consistent,Oklahoma,California and in states such as Pennsylvania.nIn the United States,hydraulic power resource of resource utilization is poorer,hydraulic can provide the U.S.energy quantity is 4.4 percent.n forestn The us forest distribution,the comparative broad roughly a third of the land is forest belt,except for the central plains,west half the mountains outside the desert southwest of grassland and basically,people with forest cover.nThe existing forest area,there are 240 million hectares is the origin of the commercial use wood,accounting for the entire two-thirds of the forest.nForest resources main distribution:1)northwest XiYang coast,this one too YuanShiLin reserves of the national forest 90%,is the biggest commercial use wood to producing area.2)the north and the south in the forest,forest primarily.3)Alaska is also a potential forest region,where there are a lot of primitive forests,not cutting.