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1.1 Location,Size and Geographical Divisions(美国概况教材第一章)

2008年09月16日  所属:美国概况  来源:南京航空航天大学  作者:南京航空航天大学

英美概况之美国概况教材:第一章 Geographical Features and Natural Resources之1.1Location,Size and Geographical Divisions。

美国概况教材:第一章:美国地理特征和自然资源(Chapter 1:Geographical Features and Natural Resources)

1.1 Location,Size and Geographical Divisions(美国的位置、面积和地理划分)

The United States lies in the central part of North America with its two youngest states——Alaska on the northwest tip of the continent and Hawaii in the central Pacific.The continental United States stretches 4,500 kilometers from the Atlantic Ocean on the east to the Pacific Ocean on the west.It borders Canada on the north,and reaches south to Mexico and the Gulf of Mexico. The total area of the country is a little over 9,360,OOO square kilometers,which makes it the fourth largest country in the world.

So far as the geographical features are concerned,the large territory of the continental United States can be divided into three basic areas:the Atlantic Seacoast west to the Appalachian Mountains;the great Mississippi Rivet Basin between the Appalachian and the Rocky Mountains; the Rockies west to the Pacific Ocean.

    (1)The Atlantic Seacoast West to the Appalachians

    Along the Atlantic Seacoast is a narrow plain which begins far up the coast and becomes wider as it goes south.In the Northeast,the land extending to the Atlantic coastline is hilly,rocky and mostly infertile.Much of it is covered by heavy forests.The coastline,however,is broken by many excellent harbors which were once important centers of commerce and trade in the early days of the country.The Middle Atlantic Seacoast,the most densely populated region in the U.S.,is a flat and fertile region. Despite the fact that some of the largest cities in the world are situated here, there are miles and miles beautiful,open country all through this section. Many heavily wooded mountains and deep valley cut by wide and beautiful rivers can be found.Three important rivers, the Hudson,the Delaware and the Susquehanna,flow through this part of the country.In the deep south,the coast plain is very low and wide. The soil of this region varies greatly.Some parts along the coast are almost pure sand.Other sections contain some of the richest soil in the whole country.However,the weather,the land and the rivers that run through the south have made it, for most of its history, a great agricultural region.

The coastal plain appears to be fenced in by the Appalachian Mountains that begin in Canada and reach all the way to Georgia and Alabama.These are old mountains with rounded tops and wooded hills,usually not exceeding 800 meters in height. Most of the mountain ridges are low enough to be easily crossed by modern roads.In parts of the Appalachians the land is not good for farming.But the Appalachians have much beautiful scenery, and there are many tourist resorts.

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