施心远听力教程3第2版Unit3.ppt

* * * * * Section Two---Part Two Key to Ex. A: Rivers are important to humans because they supply fresh drinking water, serve as home for important fishes, and provide transportation routes. Section Two---Part Two Keys to Ex. B: Salmon are very sensitive to environmental conditions and require cool, well-oxygenated water to thrive. 2. The closure of factories that had poured toxins and other pollutants into the river boosted water quality significantly and modern sewage processing plants helped eliminate some of the foul smells. Continued 3. The river’s depth and navigability helped make Glasgow an important center for importing tobacco, sugar and cotton from the Americas starting in the 1600s. 4. The mills and factories that lined the Clyde made steel, textiles and chemicals, tanned leather and even produced candy and brewed alcohol. Continued 5. When the factories began to close in the second half of the 20th century, working-class Glasgow, Scotland’s largest city, gained a reputation for social deprivation and rough streets. Section Two---Part Two Keys to Ex. C: 1-4: A C C B 5-8: D C B A Section Two---Part Two Keys to Ex. D: The Clyde’s depth and navigability helped make Glasgow an important center for importing tobacco, sugar and cotton from the Americas starting in the 1600s. And the city became a center of British shipbuilding and one of the country’s great manufacturing centers during the Industrial Revolution. More recently, its art museums and nightlife have helped drive an economic comeback that has turned the city into a popular tourist destination. 2. (Open) Section three: News News item 1 News item 1: Exercise A This news item is about the NATO eastward expansion and its military contribution. Exercise B At the Prague Summit many people believe the political and military, alliance, created after World War II to provide a collective security system for the ten West European countries and the United States and