大学英语六级考试试题及参考答案.docx

1、大学英语六级考试试题及参考答案2007年12月大学英语六级考试试题及参考答案Part I Writing (30 minutes)The digital age1. 如今，数字化产品越来越多，如2. 使用数字化产品对于人们学习工作和生活的影响。Part II Reading Comprehension (Skimming and Scanning) (15 minutes) Seven way to Save the World Forget the old idea that conserving energy is a form of self-denialriding bicycles,

2、 dimming the lights, and taking fewer showers. These days conservation is all about efficiency: getting the sameor betterresults from just a fraction of the energy. When a slump in business travel forced Ulrich Ramer to cut costs at his familyowned hotel in Germany, he replaced hundreds of the hotel

3、s wasteful light bulbs, getting the same light for 80 percent less power. He bought a new water boiler with a digitally controlled pump, and wrapped insulation around the pipes. Spending about 100,000 on these and other improvements, he slashed his 90,000 fuel and power bill by 60,000. As a bonus, t

4、he hotels lower energy needs have reduced its annual carbon emissions by more than 200 metric tons. “For us, saving energy has been very, very profitable,” he says. “And most importantly, were not giving up a single comfort for our guests.” Efficiency is also a great way to lower carbon emissions an

5、d help slow global warming. But the best argument for efficiency is its costor, more precisely, its profitability. Thats because quickly growing energy demand requires immense investment in new supply, not to mention the drain of rising energy prices. No wonder efficiency has moved to the top of the

6、 political agenda. On Jan. 10, the European Union unveiled a plan to cut energy use across the continent by 20 percent by 2020. Last March, China imposed a 20 percent increase in energy efficiency by 2020. Even George W. Bush, the Texas oilman, is expected to talk about energy conservation in his St

7、ate of the Union speech this week.The good news is that the world is full of proven, cheap ways to save energy. Here are the seven that could have the biggest impact.InsulateSpace heating and cooling eats up 36 percent of all the worlds energy. Theres virtually no limit to how much of that can be sa

8、ved, as prototype “zero-energy homes” in Switzerland and Germany have shown. Theres been a surge in new ways of keeping heat in and cold out (or vice versa). The most advanced insulation follows the law of increasing returns: if you add enough you can scale down or even eliminate heating and air-con

9、ditioning equipment, lowering costs even before you start saving on utility bills. Studies have shown that green workplaces (ones that dont constantly need to have the heat or air-conditioner running) have higher worker productivity and lower sick rates.Change Bulbs Lighting eats up 20 percent of th

10、e worlds electricity, or the equivalent of roughly 600,000 tons of coal a day. Forty percent of that powers old-fashioned incandescent light bulbsa 19th-century technology that wastes most of the power it consumes on unwanted heat. Compact fluorescent lamps, or CFLS, not only use 75 to 80 percent le

11、ss electricity than incandescent bulbs to generate the same amount of light, but they also last 10 times longer. Phasing old bulbs out by 2030 would save the output of 650 power plants and avoid the release of 700 million tons of carbon into the atmosphere each year.Comfort Zone Water boilers, space

12、 heaters and air conditioners have been notoriously inefficient. The heat pump has altered that equation. It removes heat from the air outside or the ground below and uses it to supply heat to a building or its water supply. In the summer, the system can be reversed to cool buildings as well.Most ne

13、w residential buildings in Sweden are already heated with ground-source heat pumps. Such systems consume almost no conventional fuel at all. Several countries have used subsidies to jump-start the market, including Japan, where almost I million heat pumps have been installed in the past two years to

14、 heat water for showers and hot tubs.Remake Factories From steel mills to paper factories, industry eats up about a third of the worlds energy. The opportunities to save are vast. In Ludwigshafen, German chemicals giant BASF runs an interconnected complex of more than 200 chemical factories, where h

15、eat produced by one chemical process is used to power the next. At the Ludwigshafen site site alone, such recycling of heat and energy saves the company 200 million a year and almost half its CO2 emissions. Now BASF is doing the same for new plants in China. “Optimizing (优化) energy efficiency is a d

16、ecisive competitive advantage,” says BASF CEO Jurgen Hambrecht.Green Driving A quarter of the worlds energy-including two thirds of the annual production of oilis used for transportation. Some savings come free of charge: you can boost fuel efficiency by 6 percent simply by keeping your cars tires p

17、roperly inflated (充气). Gasoline-electric hybrid(混合型的) models like the Toyota Prius improve mileage by a further 20 percent over conventional models.A Better FridgeMore than half of all residential power goes into running household appliances, producing a fifth of the worlds carbon emissions. And tha

18、ts true even though manufacturers have already hiked the efficiency of refrigerators and other white goods by as much as 70 percent since the 1980s. According to an International Energy Agency study, if consumers chose those models that would save them the most money over the life of the appliance,

19、theyd cut global residential power consumption (and their utility bills) by 43 percent.Flexible PaymentWho says you have to pay for all your conservation investments? “Energy service contractors” will pay for retrofitting（翻新改造）in return for a share of the clients annual utility-bill savings. In Beij

20、ing. Shenwu Thermal Energy Technology Co. specializes in retrofitting Chinas steel furnaces. Shenwu puts up the initial investment to install a heat exchanger that preheats the air going into the furnace, slashing the clients fuel costs. Shenwu pockets a cut of those savings, so both Shenwu and the

21、client profit.If saving energy is so easy and profitable, why isnt everyone doing it? It has do with psychology and a lack of information. Most of us tend to look at todays price tag more than tomorrows potential saving. That holds double for the landlord or developer, who wont actually see a penny

22、of the savings his investment in better insulation or a better heating system might generate. In many peoples minds, conservation is still associated with self-denial. Many environmentalists still push that view.Smart governments can help push the market in the right direction. The EUs 1994 law on l

23、abeling was such a success that it extended the same idea to entire buildings last year. To boost the market value of efficiency, all new buildings are required to have an “energy pass” detailing power and heating consumption. Countries like Japan and Germany have successively tightened building cod

24、es, requiring an increase in insulation levels but leaving it up to builders to decide how to meet them.The most powerful incentives, of course, will come from the market itself. Over the past year, sky-high fuel prices have focused minds on efficiency like never before. Ever-increasing pressure to

25、cut costs has finally forced more companies to do some math on their energy use.Will it be enough? With global demand and emissions rising so fast, we may not have any choice but to try. Efficient technology is here now, proven and cheap. Compared with all other options, its the biggest, easiest and

26、 most profitable bang for the buck.1. What is said to be best way to conserve energy nowadays?A) Raising efficiency. B) Cutting unnecessary costs.C) Finding alternative resources. D) Sacrificing some personal comforts.2. What does the European Union plan to do?A) Diversify energy supply. B) Cut ener

27、gy consumption.C) Reduce carbon emissions. D) Raise production Raise production efficiency.3. If you add enough insulation to your house, you may be able to _.A) improve your work environment B) cut your utility bills by half C) get rid of air-conditioners D) enjoy much better health4. How much of t

28、he power consumed by incandescent bulbs is converted into light?A) A small portion. B) Some 40 percent. C) Almost half. D) 75 to 80 percent.5. Some countries have tried to jump-start the market of heat pumps by _.A)upgrading the equipment B)encouraging investments C) implementing high-tech D)providi

29、ng subsidies6. German chemicals giant BASF saves 200 million a year by _.A) recycling heat and energy B) setting up factories in ChinaC) using the newest technology D) reducing the CO2 emissions of its plants7. Global residential power consumption can be cut by 43 percent if _.A) we increase the ins

30、ulation of walls and water pipesB) We choose simpler models of electrical appliancesC) We cut down on the use of refrigerators and other white goodsD) We choose the most efficient models of refrigerators and other white goods 8. Energy service contractors profit by taking a part of clients_.9. Many

31、environmentalists maintain the view that conservation has much to do with _.10. The strongest incentives for energy conservation will derive from _.Part III Listening Comprehension (35 minutes)Section A11. A) Proceed in his own way. B) Stick to the original plan. C) Compromise with his colleague. D) Try to change his colleagues mind.12. A) Mary has a keen eye for style. B) Nancy regrets buying the dress. C) Nancy and Mary went shopping together in Rome. D) Na