tailieunhanh - ĐỀ THI THỬ ĐẠI HỌC NĂM HỌC 2010-2011 Môn Thi: Tiếng Anh

Tham khảo tài liệu 'đề thi thử đại học năm học 2010-2011 môn thi: tiếng anh', tài liệu phổ thông phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | SỞ GD-ĐT TỈNH QUẢNG NAM ĐỀ THI THỬ ĐẠI HỌC NĂM HỌC 2010-2011 TRƯỜNG THPT HIỆP ĐỨC Môn Thi Tiếng Anh Thời gian 90 phút KKTGGĐ Đề gồm 05 trang I. Read the passage and choose the best answer Many people are unaware of how many of the products we use every day come from petroleum and natural gas. In the United States each family of four uses more than two tons of petroleum products annually. That s almost 1200 lbs of chemicals each year for every man woman and child in the United States - a staggering total of 225 billion pounds of chemicals from petroleum and to a lesser extent natural gas. Of the vast amount of petroleum and natural gas we consume more than 90 percent is burned as fuels. Only about percent is used for the manufacture of petrochemicals by the chemical industry. These petrochemicals vary widely in their functions and includes such products as drugs detergents rubbers paints fertilizers dyes perfumes explosives food preservatives artificial sweeteners and agricultural chemicals. Finally about percent of the oil and natural gas is used as raw material for plastics. This small percentage translates into the production of billions of pounds of polymers that yield many different and useful products. In post- World War II years the United States was flooded with domestic and imported items of extremely low cost low quality and limited lifetime. This led to the image of cheap plastics with low durability. Today however the image of plastics has changed. Plastics perform an extremely broad range of functions from heart valves and artificial kidneys to ski boots nonstick surfaces supper glues and spacecraft parts and they compete with natural products in durability. No other materials expect plastics could perform all these different functions. Plastics are replacing more and more parts of your car. The use of 1 lb of plastic can replace an average of lb of metal in an automobile. An automobile with 400 lb of plastic substituted for metal will weigh