tianyaguke1968
Introduction to U.S.A.The United States of America is a federal constitutional republic comprising fifty states and a federal district.The country is situated mostly in central North America,where its forty-eight contiguous states and Washington,D.C.,the capital district,lie between the Pacific and Atlantic Oceans,bordered by Canada to the north and Mexico to the south.The state of Alaska is in the northwest of the continent,with Canada to its east and Russia to the west across the Bering Strait,and the state of Hawaii is in the mid-Pacific.The United States also possesses several territories,or insular areas,scattered around the Caribbean and Pacific.At 3.79 million square miles (9.83 million km²) and with over 300 million people,the United States is the third or fourth largest country by total area,and third largest by land area and by population.The United States is one of the world's most ethnically diverse nations,the product of large-scale immigration from many countries.The U.S.economy is the largest national economy in the world,with a nominal 2006 gross domestic product (GDP) of more than US$13 trillion (over 19% of the world total based on purchasing power parity).The nation was founded by thirteen colonies of Great Britain located along the Atlantic seaboard.Proclaiming themselves "states," they issued the Declaration of Independence on July 4,1776.The rebellious states defeated Great Britain in the American Revolutionary War,the first successful colonial war of independence.A federal convention adopted the current United States Constitution on September 17,1787; its ratification the following year made the states part of a single republic.The Bill of Rights,comprising ten constitutional amendments,was ratified in 1791.In the nineteenth century,the United States acquired land from France,Spain,Great Britain,Mexico,and Russia,and annexed the Republic of Texas and the Republic of Hawaii.Disputes between the agrarian South and industrial North over states' rights and the expansion of the institution of slavery provoked the American Civil War of the 1860s.The North's victory prevented a permanent split of the country and led to the end of slavery in the United States.The Spanish-American War and World War I confirmed the nation's status as a military power.In 1945,the United States emerged from World War II as the first country with nuclear weapons,a permanent member of the United Nations Security Council,and a founding member of NATO.The United States entered the post–Cold War era as the only remaining superpower and a dominant economic,political,and cultural force in the world.美国简介美利坚合众国（英语：United States of America,USA）,简称美国,旧称花旗国,是位于北美洲的联邦共和制国家,也是世界上最为悠久的共和立宪制国家.美国本土东濒大西洋,西临太平洋,北靠加拿大,南接墨西哥及墨西哥湾.首都为华盛顿哥伦比亚特区.美国源自于1776年脱离英国统治的北美殖民地,13州的殖民地代表一同发表了《美国独立宣言》,在经历艰苦的独立战争后,于1783年与英国签订了巴黎协约,从此受到世界各国的承认.经过两百多年的发展,美国国土不断拓展,37个州陆续加入联邦旗下.目前有50个州,1个联邦直辖特区,以及若干海外领地.国土面积超过962万平方公里,国土面积位居世界第三或第四名.美国人口约3亿人,其数量亦为世界第三.美国国旗上的50颗白色星星代表50个州；每当新州加入联邦,次年的7月4日国旗将增加一颗星.国旗上红色及白色横条各7及6条,共13条,纪念最初的13个州.建国200多年以来,美国曾经历过南北战争（1861—65年）和经济大恐慌（1930年代）两次严酷考验[NextPage],仍坚守自由民主制政治制度,成为宪法民主和公民自由的代表性国家.美国庞大的经济、文化、科技、和军事影响力贯穿了整个20世纪.在第一次世界大战和第二次世界大战中,美国和同盟国一同获得胜利,并经历数十年的冷战后终于拖垮苏联,成为世界上唯一的超级大国.当今美国在全世界的经济、政治、军事等众多领域的庞大影响力都是无他国能比的.——转自〈维基百科全书〉
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USA GDP American economic strength (GDP) $10, almost 10 of total Japanese, German English and French world before GDP, the total is slightly higher than that of all members of the EU GDP. American total world trade accounted for more than 20% of the world's total import and export volume. America stock market has a history of over 200 years, USA share of world equity ratio is about 50%. The Dow Jones Industrial Average (DJIA) is one of the world's three major indexes of stock market, and the NASDQ index is the development of world high-tech enterprises of the vane, is a network technology and knowledge economy myth. America global currency status: in 1944, a American dominated the Bretton Woods system, USA depends on the comprehensive national strength lay the currency hegemony. The dollar as a global reserve ratio is about 70%, dollars share of global foreign exchange transactions reached 60%, the dollar accounts for Global trade settlement reached 60%. USA have right to speak with the largest dominant position in the global economy of the three leading organizations -- the world trade organization, the International Monetary Fund, the world bank. The world 500 strong enterprises before 10, USA accounted for 6, the proportion of 60%; American listed 189 companies, accounting for 37.80% of the share.美国经济实力 美国国民生产总值（GDP）10万亿美元，几乎是世界GDP前10名中日本、德国英国与法国的总和，还略高于欧盟所有成员国GDP的总和。 美国全球贸易总额占世界进出口贸易总额20%以上。 美国股市拥有200多年的历史，美国股市占全球股市的比例大约在50%左右.道琼斯工业平均数（DJIA）是世界三大指标股市之一，而NASDQ股指则是世界高科技企业发展的风向标，是一个网络科技+知识经济的神话。 美国全球货币结算地位： 1944年，美国主导的布雷顿森林 体系建立，美国依靠国家综合实力奠定了美元的国际货币霸权地位。美元在全球外汇储备所占的比例大约在70%左右，美元占全球的外汇交易达到60%左右，美元占全球的贸易结算也达到60%左右。 美国在全球经济的三大领导组织——世界贸易组织、国际货币基金组织、世界银行中都拥有最大的发言权与主导地位。 世界500强企业前10名，美国占6家，比例60%；美国 189家企业入围 ，占 37.80%份额。 希望对你有所帮助。
一叶扁舟85
我是用中文来介绍美国西南地区的： 西南部，由得克萨斯西部、俄克拉荷马部分地区、新墨西哥州、亚利桑那州、内华达州和加利福尼亚南部的部分内陆地区组成。 西南部的气候比较干燥，人口较少，西班牙裔美国人和土生土长的美国人较多。城市以外的地区空旷辽阔，许多地方为沙漠。壮观的大峡谷就位于这个地区，此外，还有莫纽门特谷地，许多西部片都以此作为荒凉而美丽的背景。莫纽门特谷地位于纳瓦霍族保护区内，这里栖息着人口最多的美洲印第安部落。西南部部分地区一度属于墨西哥。美国在1846-1848年的墨美战争之后获得了这片土地。这儿的墨西哥遗产仍对该地区产生着重大影响，对从遥远的南方来的移民(无论是合法的还是非法的)来说，这儿是一个方便的定居点。该地区的人口正迅猛增长，尤其是亚利桑那州，它作为寻找温暖气候的美国退休人员的目的地，可与南方诸州相匹敌。 你是要英文的吗？ NewMexicowasnamedbysixteenth-centurySpanishexplorerswhohopedtofindgold
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