The United States of America, with an area of 9.37 million square kilometers and a population of 273 1 100 million, is the capital of Washington. * * * It is divided into 50 states and the District of Columbia, where the capital is located. Overseas Territories and Trusteeship include Guam, American Samoa, Trust of Pacific Islands, Federated States of Puerto Rico and United States Virgin Islands.
The United States is located in the south of North America, bordering the Atlantic Ocean in the east, the Pacific Ocean in the west, Canada in the north and Mexico and the Gulf of Mexico in the south. The United States occupies 7% of the world's total land area, ranking fourth in the world. There are many rivers and lakes in the United States, and the water system is complex. The rivers flowing into the Atlantic Ocean east of the Rocky Mountains mainly include Mississippi River, Connecticut River and Hudson River. Among them, the Mississippi River is 6020 kilometers long, ranking third in the world.
The climate in America
Most of the United States has a temperate and subtropical climate, and only the southern tip of Florida Peninsula has a tropical climate. Alaska is located between 60 and 70 degrees north latitude, belonging to the cold climate zone of the Arctic Circle, and Hawaii is located south of the Tropic of Cancer, belonging to the tropical climate zone. However, due to the vast territory and complex terrain of the United States, the climate varies greatly from place to place.
Population of the United States
America has always been regarded as a melting pot. People belong to different races and come from different countries. Among them, whites account for 84%, and most of them are descendants of European immigrants. Blacks account for 12%, Asians account for 3%, and Indians account for 1%. About 77% of the total population in the United States lives in urban areas, and nearly half of them are concentrated in 37 big cities, which is largely driven by employment opportunities. As new immigrants flock to big cities, residents of big cities move to suburbs, and the population in suburbs grows faster than that in urban areas. The population tends to be aging, with the population over 85 reaching 4 million, and the proportion of young people has dropped sharply.
American language
The official language of the United States is English. However, due to geographical barriers and the passage of time, great differences have taken place between American and British languages, and American English with American characteristics has evolved. In addition, some regions and ethnic groups also use other languages, such as French and Spanish. The United States is a multi-religious country without a state religion, and religious beliefs are extremely common.
American politics and economy
The United States implements the separation of powers, and the legislative power belongs to the Congress composed of the Senate and the House of Representatives. The executive power belongs to the president; Judicial power belongs to the Supreme Court and the National Assembly Court. Decentralization and checks and balances. The federal constitution is the basic document of the American government and the supreme law of the United States. 1789 was declared effective by the first US Congress in March. It is the first written constitution in the world as an independent and unified country.
American politics and economy
The United States is a superpower with highly developed economy. American agriculture is a typical modern capitalist agriculture, and its agricultural output value accounts for 1.7% of GDP. The output of wheat, corn, soybean, cotton and other major agricultural products ranks first in the world, with grain output accounting for 20% of the world's total output. The foreign exchange income from the export of agricultural products reaches 40 billion dollars every year, which is the largest foreign exchange income in the United States. American animal husbandry is dominated by cattle, leading the world in mechanization and specialization, and ranking first in meat production in the world. Fishing is concentrated on the coast of New England, the Atlantic and Pacific coasts and Alaska. Alaska, in particular, is a world-famous fishing ground.
The US federal government's revenue and expenditure is close to 20% of GDP, so it can play a greater role in objective economic adjustment. The American financial system is mainly composed of Federal Reserve banking system, commercial banking system and non-bank financial institutions.
The foreign trade of the United States is very developed, and its main partners are Canada, Japan, Mexico, European member countries and newly industrialized countries and regions in Asia. The main export commodities are machinery, transportation equipment, agricultural products, chemical products, high-tech products, arms and so on.
American industrial production
The United States has greatly surpassed other countries in industrial equipment capacity and production scale, becoming the largest industrial country in the world. The total industrial output value of the United States accounts for 25.9% of the world industrial production. The high-tech industry in the United States is full of vitality, showing the potential for rapid development. The United States ranks first in the world in high-tech fields such as computer technology, power and telecommunications, bioengineering, chemistry and aerospace. The United States now has 6,543.8+0.5 million information databases, and American Data Resources Corporation (ORI) is the largest economic database in the world, with 6,543.8+0.5 million time series data of economic information of all countries in the world.
Communication technology in America
In terms of modern communication technology, the United States also has absolute advantages. The combination of microelectronics technology and communication technology produces a modern communication system, which can process and transmit telegrams, telephones, images and data through satellites, optical fiber cables, databases and computer terminals. Intel Corporation of the United States is the largest manufacturer of computer chips in the world, and its semiconductor sales in 1997 exceeded $2 10 billion, ranking first in the world.
American education
The United States is one of the most developed countries in education in the world. It is divided into three stages: primary education, secondary education and higher education. The current academic system is basically six years in primary school, three years in junior high school, three years in senior high school and two to four years in higher education. 9 to 10 or 1 1 to 12. There are more than 3600 institutions of higher learning in the United States.
American art and culture
There are many art schools in America, and there are more than 570 art schools and millions of professional and amateur painters in America. Almost every city has art museums, the most famous of which is the National Gallery of Washington. The medical and health undertakings in the United States are developed, with high-level medical research and doctors. Since the establishment of the Nobel Prize in Physiology and Medicine, more than 60 people have won prizes in the United States.
American science and technology
The United States is a highly developed country in science and technology. There are more scientists and engineers engaged in scientific research than Japan, Germany and France combined. American researchers get technology patents every year, which is equal to the sum of patents obtained by other countries in the world. The United States has established a 1 1 university-based science and technology center, which is engaged in basic and applied research on particle astrophysics, quantum electronic structure, protein binding and nucleic acid biotechnology, high-temperature superconductors, microbial ecology and so on. In the five supercomputing centers established by the National Science Foundation of the United States, more than 600 scientific and technical personnel use high-function computers to handle more than 2,000 engineering projects from molecular biology to astrophysics.
Famous cities in America
Famous American cities include Washington, new york, Los Angeles, Chicago, Philadelphia, San Francisco, Atlanta, Houston, Detroit and Seattle. The scale, facilities and income of American tourism are the highest in the world. Located in the middle of the Pacific Ocean, the Hawaiian Islands are composed of more than 20 main islands, with a pleasant climate and evergreen seasons. Coupled with colorful corals and shells on the seabed and rare tropical fish, it is very popular with tourists. Niagara Falls, located on the border between the United States and Canada, is about 304 meters wide and falls from the cliff wall of 55-58 meters. The spray splashed, and the white fog aroused by the spray went straight into the sky. The roar could still be heard from 10 km away. Mount Rushmore, located in the west of Badenland, South Dakota, is carved with the heads of four presidents: Washington, Jefferson, Roosevelt and Lincoln. Its artistic modeling vividly reflects the characters and characteristics of these four great men, and it still makes people respect. In addition, the Great Lakes: Lake Ontario, Lake Erie, Lake Huron, Lake Michigan, Lake Superior and Alaska, the world of ice and snow, are all places that tourists yearn for.