(1) ST.LOUIS is a big city in eastern Missouri, USA. Located in the middle reaches of the longest Mississippi River in the United States, in the center of the continental United States, almost in the geometric center of the United States, the geographical position has important strategic significance. The economic development of the United States was pushed from the eastern Atlantic coast to the vast and desolate areas in the west, from which European colonists and later people and goods flowed to the west. American geographers usually call it the gateway to the west. The Sanan Arch in the city center is a symbol of the westward development of the United States. This magnificent stainless steel parabolic building, with a height of192m, started construction in 1964 and took only two years to build. There is an elevator at the bottom of the arch leading to the top floor.

Today, St. Louis is the largest city in Missouri, USA, and also an important industrial city and land and water transportation hub along the Mississippi River. The downtown area is divided into two parts by the Mississippi River, and the eastern part of the river is called East St. Louis, which was developed earlier in history. Hexi is called St. Louis. Although its historical development is late, it is the main part of the urban area, with an area of about 159 square kilometers, and it is the seat of the state government.

Historically, St. Louis was the port of Indian fur trading market and the largest cattle market in the United States, and later developed into the center of American leather and shoemaking industry. 1764, Pierre, French adventurer and businessman? Leclerc came from New Orleans and came to the birthplace of St. Louis, where the Mississippi and Missouri rivers meet. At that time, the French Empire was in decline. With the desire to get rid of the control of British colonists and build the last city in France, he established the initial prototype of the city on the west bank of the Mississippi River. In memory of King St Louis IX of France, this place was named St Louis. After 1800, St. Louis experienced the initial prosperity and development. By 1850, it had developed into a medium-sized city with a population exceeding 16.l, making it the largest city in the United States at that time.

After the Civil War, due to the construction of railways and the rapid development of transportation, industry and commerce, St. Louis became a hub of land and water transportation and an important base for the development of the western region. St Louis has a vast economic hinterland, excellent transportation and water resources, and abundant natural resources such as coal, iron, limestone and non-ferrous metals nearby, which provides extremely favorable conditions for the development of modern industry. There are more than 3,000 industrial enterprises in the St. Louis metropolitan area, which is one of the gathering areas of various industries in the United States. Therefore, diversification, specialization and modernization are the most striking characteristics of St. Louis industry. The automobile manufacturing industry was once in a leading position in the country. After the middle of the 20th century, it fell to the second largest automobile manufacturing center in the United States after Detroit.

The electronic instrument industry and electronic technology in St. Louis are quite developed, and Emerson Electric Appliance Company is a world-class electronic enterprise. The headquarters of McDonald Douglas, the largest aircraft manufacturing company in the United States, is located here. The world's first moon landing spacecraft was built here, and many more spacecraft were built later. The food industry and shoe-making industry in St. Louis are also very developed. The food industry is famous for producing biscuits and beer all over the country. The brewing industry monopolized the whole country. There are more than 30 shoe factories here, which is the second largest shoe factory in the United States after Boston.

St Louis is the largest inland shipping center, the second largest railway transportation hub, the fifth largest air transportation hub and the sixth largest truck transportation center in China. The coastline of the port in the city is 1 16 km, and there are nearly 100 modern docks on both sides of the Mississippi River. There are 14 railway lines in St. Louis, and the railways passing through this city account for 73% of the national total mileage. Many important industrial products and raw materials and fuels are connected with stations in the east, west, north and south of the country through this hub. There are 17 transfer stations in the urban area? 1. Jing Jing? Jacket? 8 cargo handling yards.

Due to the moderate geographical location of St. Louis, jets can reach most major urban areas in the continental United States in about three hours. There are direct flights between the city and 55 cities across the country, and more than 250 flights take off at the international airport every day.

There are many descendants of Welsh, Germans, Italians and Irish among the residents of St. Louis. And a large number of black people lived here only after World War II. At present, there are more than 200,000 black people living in urban areas, accounting for about 1/3 of the city's total population. Due to the complex historical background and multi-ethnic settlement, some areas in St. Louis have formed international residential areas and small towns, and their lifestyles and habits are not the same. Many American writers describe the character of St. Louis people as a fine tradition, with the courage and courage of northerners, the culture and technology of orientals, the foresight of westerners and the hospitality of southerners, which shows that St. Louis people are closely related to all aspects of the United States.

St. Louis has a humid continental climate with four distinct seasons and an average annual temperature of 12 degrees. In winter, it is affected by the southward invasion of Canada's cold air mass, which is easy to cause frost and snow weather, and in summer, it is controlled by the tropical marine air mass in the Gulf of Mexico, which is sultry.

(2) the provinces of central and western Argentina. It covers an area of 76,700 square kilometers. The population is 286,000 (199 1). St Louis, the capital. The mountainous areas in the west and north, and the arid pampas Plain in the south. The plains are hot, the mountains are cool and the climate is dry. The annual precipitation is 600-900 mm, decreasing from east to west, with large areas of desert and saline-alkali land. The main rivers are Quinto River and Konglala River. Rich in mineral resources, including silver, lead, zinc, tungsten and agate. The forest area is 6.5438+0.2 million hectares. The economy is dominated by forestry and animal husbandry, and cattle, sheep and pigs are raised. The valley develops irrigated agriculture, mainly producing grapes, alfalfa and wheat. Industry mainly focuses on the processing of agricultural and livestock products.

③ A city in central and western Argentina, the capital of St. Louis Province. It is located at the southern foot of the St. Louis Mountains, with an altitude of 765 meters. The population is 70,000 (1980). Established in 1594. Commercial center, distributing grain, livestock, wood, agate and other minerals. There are food, sawn wood and other industries. Pan-American expressway and the railway station across the Andes have an airport. There are earthquake observation stations.

(4) the seaport in northeast Brazil, the capital of Maranh? o state. Between San Marcos Bay and San Jose Bay, as well as the northwest coast of St. Louis Island, there are railways connecting the mainland. The population is 182000( 1980). Established in 16 12. Mainly exported to Babasu oil, castor seeds, spices, leather, wood and so on. There are sugar, textile, oil extraction, leather, canned fruit, cocoa processing, metal products, chemistry and other industries as well as fisheries. There is a university. Churches and other buildings in colonial cities. This railway connects teresina and Fortaleza.