第1个回答 2016-03-28
The United States introduced
In North America, southern United States, are Atlantic, the West Pacific Ocean, north to Canada, south through Mexico and the Gulf of Mexico.
From east to west throughout the territory can be divided into five geographical regions: the coastal plain in southeastern: Mexico and the Atlantic coastal plain Plain two parts.
This zone elevation of 200 meters below, the majority formed by the alluvial rivers, especially the Mississippi River delta, is the world's largest delta, soil and oil, fertile soil. Estuary near some marshland. Located in the geographical area of the Florida Peninsula is the largest peninsula in the Appalachian Mountains west side of the Atlantic coastal plain, basic parallel with the coast, more than 2,300 km long, the general 1000-1500 meters altitude, mountains formed by several parallel. The Plain was inverted triangle, a long North American and Canadian borders, the Southern Atlantic coastal plains along the Rio Grande River. Western mountains from the west is composed of two mountains, east of Rocky Mountains, the western Nevada mountains and karst mountain ash. Old fold after exercise products. Whitney Nevada mountain peak elevation of 4,418 meters, the highest point for the continental United States, the karst mountain ash Rainier Hill elevation 4,392 meters, after Whitney peak. Western mountain plateau by the Colorado Plateau, Wyoming plateau, Colombia and the Grand Canyon of the plateau, the western United States for the most complex geological structure areas. Grand Canyon in northwestern Arizona, a series of convoluted twists and turns, complicated and deep valley gorge formed momentum majestic, steep rock wall, the world's rare natural landscape. Many American rivers and lakes, River complex, in general, can be divided into three main river systems: Where in Rocky Mount and into the Atlantic east of the river are called Atlantic River, a major Mississippi River, Connecticut River and He was Morikawa. The length of the Mississippi River 6,020 kilometers, ranking third in the world. Where the rivers into the Pacific said Pacific River. Major Colorado River, Columbia River, the Yukon River. In the North-eastern Great Lakes. Including Lake Superior, Lake Michigan, Lake Huron, Lake Erie and Lake Ontario, a total area of 245,000 square kilometers, the world's largest freshwater waters, known as the "North American Mediterranean," said one Lake Michigan is the United States, the other four lakes were for the United States and Canada. Lake Superior, the world's largest fresh water lake, the lake area in the world, second only to being the second in the world and the Caspian Sea.
The United States is the most temperate climate and subtropical climate, only the southern peninsula of Florida is tropical. Alaska in the north between 60 to 70 degrees, is the cold Arctic climate zone; Hawaii in the south of the Tropic of Cancer, is a tropical climate zone. But because the United States, the sprawling complex terrain, climate around the larger differences. Generally can be divided into five climatic zones: Northeast coastal temperate climate zones. Labrador in the region due to the cold weather and the Northern cold, cold winter, the average temperature for January 6 ℃, mild wet summer, the average temperature in July is 16 ℃. The annual average rainfall of 1,000 mm around. Southeast subtropical climate zones. Because of the Gulf Stream, warm and humid climate, the average temperature in January is 96 ° C, an average July temperature of 24 to 27 ° C with an average annual rainfall of 1,500 mm. Central Plains continental climate zones. The region was of continental climate, the cold winter, the average temperature in January is about -14 ° C, hot summer, the average temperature in July was 27 to 32 ℃. The annual average rainfall of 1,000 mm to 1,500. Western Plateau dry climate zones. Inland climate in the region, greater temperature plateau last year, the Colorado Plateau, the temperature as high as 25 ℃. The average rainfall of 500 mm in the following, desert plateau less than 250 mm of precipitation. The oceanic climate in the Pacific Rim. Winter in the region, abundant rainfall. The average temperature in January in 4 ° C above the average temperature in July 20 to 22 ℃. The annual average rainfall of 1,500 mm around.
America's agricultural, mineral and forest resources in the world occupy the pivotal role. The United States location, weather conditions and terrain are unique structure. U.S. agricultural land (cropland and pasture), about 430 million hectares of agricultural land all of the Earth about 10%. Abundant rainfall, fertile soil of the world's total grain output of 1 / 5, the main agricultural and livestock such as wheat, corn, soybean, cotton, meat production tops in the world.
The United States rich mineral resources, iron ore, coal, natural gas, lead, zinc, silver, uranium, molybdenum, zirconium, tops in the world in terms of output, but strategic resources such as titanium, manganese, tin, cobalt, chromium, nickel, mainly rely on imports. The total coal reserves of 3.5996 trillion tons, the total oil reserves of over 240 million tons, and natural gas reserves of 5.6034 trillion cubic meters.
The United States has 1.8 billion hectares of forest, of the nation's total land area of about 31.5%, with the main species of American Song, Pinus ponderosa, White Pine and Oak category.本回答被网友采纳