郑州函授培训班:帮我找一下有关独立日来历的介绍

泱泱美国，幅员辽阔，从南部湿润的佛罗里达到内华达沙漠，直至冬节严寒的五大湖区，地形多姿多样，气候变化万千。美国总人口超过2亿，他们来自世界各地、各个民族，所以美国堪称移民之国。
美国全称美利坚合众国，各行政州拥有独立的自治权。18世纪英国在北美洲建立了13个殖民地，1775年美国独立战争爆发，第二年7月4日独立宣言发表，美利坚合众国正式成立。1783年独立战争结束，美国合法的独立性为英国所承认。

美国共有50个州、1个华盛顿特区，幅员辽阔，地形复杂。东部的大西洋沿岸多为平原丘陵，森林资源丰富，湖泊众多，重要的城市有华盛顿、洛杉机、旧金山、费城、迈阿密、中部的大平原是重要的农牧区，6400公里长的密西西比河纵贯南北，重要的城市有亚特兰大、芝加哥、 休斯顿以及新奥尔良等。在大平原的西部大山区，有著名的科罗拉多大峡谷和黄石国家公园；靠太平洋的西海岸地区有风光绮旎、阳光灿烂的加里福尼亚州，旧金山和洛杉机就在这里，西岸的重要城市还有西雅图。在北部近加拿大边界附近，有著名的五大湖游览区，其中最壮观的景点是尼亚加拉达瀑布。此外，位于美国西面太平洋上的夏威夷群岛也是全球闻名的火山岛，已开发成风景优美的度假胜地。

美国是个经济发达和高度现代化的国家，其丰富的自然资源和多样的民族文化使它成为极具吸引力的旅游国家.

Vast US, vast in territory, achieves the Nevada desert from south moist Flores, until the winter severely cold five big lake districts, the terrain varied is diverse, the climate is eternally changing. The American total population surpasses 200000000, they come from world each place, each nationality, therefore US may be called country of the immigration.
The American full title United States of America, various administrative state has the independent autonomy. 18th century England has established 13 colonies in North America, in 1775 the American Revolution erupted, the second year on July 4 the Declaration of Independence published, the United States of America had been established officially. In 1783 the war of independence ended, the American legitimate independence acknowledged for England.

US altogether has 50 states, 1 Washington D.C., vast in territory, the terrain is complex. The eastern part Atlantic coast many is the plain knoll, the forest resources rich, the lake is multitudinous, the important city has Washington, the Luo river cedar machine, San Francisco, the Philadelphia, Miami, the middle great plains is the important farmland and pasture, 6,400 kilometer long Mississippi river north-south north and south, the important city has Atlanta, Chicago, Hueston as well as New Orleans and so on. In the great plains western big mountainous area, has the famous Colorado Grand Canyon and the Huang Shih country park; Depends on the Pacific Ocean the West coast area to have the scenery 绮 旎, the sunlight bright California state, San Francisco and the Luo river cedar machine in here, West bank's important city also has Seattle. In the north near Canada boundary vicinity, has the famous five great lakes tour area, magnificent scenic spot is Nepali Asia carat reaches the waterfall. In addition, is located west US on Pacific Ocean's hawaiian islands also is the volcanic island which the whole world is well-known, has fine scenery developed fine scenery to take vacation the paradise.

US is an economy is developed and the high modernized country, its rich natural resource and the diverse national culture cause it to become has the attraction extremely the traveling country

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