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Chicago began life in 1779 (1) a small trading post on the Chicago River. A farsighted black freedman, Jean du Sable, did a flourishing fur (2) with the Native Americans. When his trading post became a fort and then a city, it was (3) Chicago. This is the Native American word for the wild onions found in the area.In 1820 Chicago (4) ten or twelve houses and a store or two. Now it is the third largest city in the (5) , and still it continues to grow. Thousands of new buildings are (6) every year. They are built to accommodate new businesses and residences. More than seven (7) people now live in and around the city.Astride the crossroads of the nation, Chicago is the largest railroad (8) in the world. No other city in the land is a larger trucking center. The city, (9) on lake Michigan, is the largest inland port in the world. O’Hare Airport is the world’s busiest commercial airport. Overall, Chicago is the leading (10) center in the United States.Its location in the heart of North America’s farmland (11) Chicago the world’s largest grain market. It also plays (12) each year to more than a thousand conventions. In 1860 Abraham Lincoln was nominated for President at the Republican convention (13) here. That was to establish a pattern for both the Democratic and Republican parties since that time. Half of all major (14) conventions have taken place in Chicago.But Chicago did not achieve success without problems. At one time pollution from the Chicago River (15) the city’s water supply from Lake Michigan. (16) pure drinking water, the engineers reversed the course of the river (17) it flowed backwards, away from the lake! This kept the water supply (18) . Even the famous fire of 1871 could not snuff out the spirits of the vital young giant. The entire central city was (19) , but citizens built anew. And they erected the first towering structure of steel and concrete. In doing so, they invented the (20) Today, as an example, Chicago’s impressive skyline includes the world’s tallest building. The 1454 foot Sears Tower. 15().
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Chicago began life in 1779 (1) a small trading post on the Chicago River. A farsighted black freedman, Jean du Sable, did a flourishing fur (2) with the Native Americans. When his trading post became a fort and then a city, it was (3) Chicago. This is the Native American word for the wild onions found in the area.In 1820 Chicago (4) ten or twelve houses and a store or two. Now it is the third largest city in the (5) , and still it continues to grow. Thousands of new buildings are (6) every year. They are built to accommodate new businesses and residences. More than seven (7) people now live in and around the city.Astride the crossroads of the nation, Chicago is the largest railroad (8) in the world. No other city in the land is a larger trucking center. The city, (9) on lake Michigan, is the largest inland port in the world. O’Hare Airport is the world’s busiest commercial airport. Overall, Chicago is the leading (10) center in the United States.Its location in the heart of North America’s farmland (11) Chicago the world’s largest grain market. It also plays (12) each year to more than a thousand conventions. In 1860 Abraham Lincoln was nominated for President at the Republican convention (13) here. That was to establish a pattern for both the Democratic and Republican parties since that time. Half of all major (14) conventions have taken place in Chicago.But Chicago did not achieve success without problems. At one time pollution from the Chicago River (15) the city’s water supply from Lake Michigan. (16) pure drinking water, the engineers reversed the course of the river (17) it flowed backwards, away from the lake! This kept the water supply (18) . Even the famous fire of 1871 could not snuff out the spirits of the vital young giant. The entire central city was (19) , but citizens built anew. And they erected the first towering structure of steel and concrete. In doing so, they invented the (20) Today, as an example, Chicago’s impressive skyline includes the world’s tallest building. The 1454 foot Sears Tower. 10().
Chicago began life in 1779 (1) a small trading post on the Chicago River. A farsighted black freedman, Jean du Sable, did a flourishing fur (2) with the Native Americans. When his trading post became a fort and then a city, it was (3) Chicago. This is the Native American word for the wild onions found in the area.In 1820 Chicago (4) ten or twelve houses and a store or two. Now it is the third largest city in the (5) , and still it continues to grow. Thousands of new buildings are (6) every year. They are built to accommodate new businesses and residences. More than seven (7) people now live in and around the city.Astride the crossroads of the nation, Chicago is the largest railroad (8) in the world. No other city in the land is a larger trucking center. The city, (9) on lake Michigan, is the largest inland port in the world. O’Hare Airport is the world’s busiest commercial airport. Overall, Chicago is the leading (10) center in the United States.Its location in the heart of North America’s farmland (11) Chicago the world’s largest grain market. It also plays (12) each year to more than a thousand conventions. In 1860 Abraham Lincoln was nominated for President at the Republican convention (13) here. That was to establish a pattern for both the Democratic and Republican parties since that time. Half of all major (14) conventions have taken place in Chicago.But Chicago did not achieve success without problems. At one time pollution from the Chicago River (15) the city’s water supply from Lake Michigan. (16) pure drinking water, the engineers reversed the course of the river (17) it flowed backwards, away from the lake! This kept the water supply (18) . Even the famous fire of 1871 could not snuff out the spirits of the vital young giant. The entire central city was (19) , but citizens built anew. And they erected the first towering structure of steel and concrete. In doing so, they invented the (20) Today, as an example, Chicago’s impressive skyline includes the world’s tallest building. The 1454 foot Sears Tower. 20().
Chicago began life in 1779 (1) a small trading post on the Chicago River. A farsighted black freedman, Jean du Sable, did a flourishing fur (2) with the Native Americans. When his trading post became a fort and then a city, it was (3) Chicago. This is the Native American word for the wild onions found in the area.In 1820 Chicago (4) ten or twelve houses and a store or two. Now it is the third largest city in the (5) , and still it continues to grow. Thousands of new buildings are (6) every year. They are built to accommodate new businesses and residences. More than seven (7) people now live in and around the city.Astride the crossroads of the nation, Chicago is the largest railroad (8) in the world. No other city in the land is a larger trucking center. The city, (9) on lake Michigan, is the largest inland port in the world. O’Hare Airport is the world’s busiest commercial airport. Overall, Chicago is the leading (10) center in the United States.Its location in the heart of North America’s farmland (11) Chicago the world’s largest grain market. It also plays (12) each year to more than a thousand conventions. In 1860 Abraham Lincoln was nominated for President at the Republican convention (13) here. That was to establish a pattern for both the Democratic and Republican parties since that time. Half of all major (14) conventions have taken place in Chicago.But Chicago did not achieve success without problems. At one time pollution from the Chicago River (15) the city’s water supply from Lake Michigan. (16) pure drinking water, the engineers reversed the course of the river (17) it flowed backwards, away from the lake! This kept the water supply (18) . Even the famous fire of 1871 could not snuff out the spirits of the vital young giant. The entire central city was (19) , but citizens built anew. And they erected the first towering structure of steel and concrete. In doing so, they invented the (20) Today, as an example, Chicago’s impressive skyline includes the world’s tallest building. The 1454 foot Sears Tower. 16().
In this new edition, the basic philosophy and outline and the balance between depth of treatment and breadth of subject-matter coverage are unchanged from previous editions. 1. We have tried to preserve these features that users of previous editions have found desirable, while incorporating a number of changes that should enhance the book’s usefulness. The textbook is adaptable to a wide variety of course outlines. The entire textbook can be used for an intensive course two or three semesters in length. For a less intensive course, many instructors will want to omit certain chapters or sections to tailor the book to their individual needs. The arrangement of this edition facilitate this kind of flexibility. 2. Conversely, many topics that were regarded a few years ago as of peripheral (次要的) importance and were omitted from introductory courses have now come to the fore again in the life science, earth and space sciences, and environmental problems. An instructor who wishes to stress these kinds of applications will find this textbook a useful source for discussion of the appropriate principles. 3. In any case, it should be emphasized that instructors should not feel constrained to work straight through the book from cover to cover. Many chapters are, of course, inherently sequential in nature, but within this general limitation instructors should be encouraged to select among those chapters that fit their needs, omitting material that is not relevant for the objectives of a particular course.
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