1、大学英语六级模拟试卷 206及答案与解析 一、 Part I Writing (30 minutes) 1 Directions: For this part, you are allowed 30 minutes to write a composition on the topic Should Euthanasia Be Legalized? You should write at least 150 words according to the outline given below in Chinese. 1. 安乐死应该合法化； 2安乐死不应合法化； 3我的观点。 Should E
2、uthanasia Be Legalized? 二、 Part II Reading Comprehension (Skimming and Scanning) (15 minutes) Directions: In this part, you will have 15 minutes to go over the passage quickly and answer the questions attached to the passage. For questions 1-4, mark： Y (for YES) if the statement agrees with the info
3、rmation given in the passage; N (for NO) if the statement contradicts the information given in the passage; NG (for NOT GIVEN) if the information is not given in the passage. 1 Natural gas Vehicles Kermit the Frog once said, “Its not that easy bein green.“ Although he wasnt referring to cars, his ob
4、servation seems particularly appropriate for the auto industry today: Designing, developing and marketing “green“ ears has not been an easy task, which is why gasoline powered vehicles still rule the road and fossil fuels still account for almost 75 percent of the worlds energy consumption. As gasol
5、ine prices soar and concern over harmful emission mounts, however, cars that run on alternate fuel sources will become increasingly important. A natural-gas vehicle, or NGV, is the perfect example of such a car-its fuel-efficient, environmentally friendly and offers a relatively low cost of ownershi
6、p. Natural Gas Basics The word “gas“ is a confusing term because it is used to describe many different substances that are similar but not exactly the same. For example, the “gas“ you put in your car is gasoline, one component of crude oil, or petroleum. Petroleum is a dark, sticky liquid mixture of
7、 compounds formed underground by the decay of ancient marine animals. Natural gas also comes from the decay of ancient organisms, but it naturally takes a gaseous form instead of a liquid form. Natural gas commonly occurs in association with crude oil. It is derived from both land plants and aquatic
8、 (水生的 ) organic matter and forms above or below oil deposits. It is often dissolved in crude oil at the high pressures existing in a reservoir. There are also reservoirs of natural gas, known as non-associated gas, that contain only gas and no oil. Natural gas consists primarily of methane (沼气 ) and
9、 other hydrocarbon gases. Hydrocarbons are organic compounds composed only of the elements carbon and hydrogen. The hydrocarbons in natural gas are called saturated hydrocarbons because they contain hydrogen and carbon bound together by single bonds. Like gasoline, natural gas is combustible (易燃的 ),
10、 which means it can be used in a combustion engine like gasoline. But cars that could burn natural gas didnt appear on the scene until the 1930s. From Field to Ford We extract natural gas trapped in underground reservoirs by drilling wells into the earth. A modern well, equipped with diamond-studded
11、 drill bits, can drill to depths approaching 25,000 feet. Throughout the 19th century, the use of natural gas remained localized because there was no way to transport large quantities of gas over long distances. In 1890, the invention of a leak proof pipeline coupling made it possible to transport g
12、as miles from the source. Improvements in pipeline technology continued over the next two decades until long-distance gas transmission became practical. From 1927 to 1931, laborers constructed more than 10 major natural gas transmission systems in the United States, making natural gas a viable energ
13、y source for many applications. The oil shortages of the late 1960s and early 1970s brought renewed interest in natural gas as a fuel source, especially for automobiles. Today, owners of natural-gas vehicles can fill up their cars at one of 1, 300 fueling stations located in the United States. Honda
14、 also offers a personal natural gas pump to people who purchase its natural-gas-powered Civic. The pump uses a homes existing natural gas lines and can be installed for 500 to 1500. Natural-gas Vehicle Design Natural-gas vehicles use the same basic principles as gasoline-powered vehicles. In other w
15、ords, the fuel (natural gas in this case) is mixed with air in the cylinder of a four-stroke engine and then ignited by a spark plug to move a piston (活塞 ) up and down. Although there are some differences between natural gas and gasoline in terms of flammability and ignition temperatures. NGVs thems
16、elves operate on the same fundamental concepts as gasoline-powered vehicles. Still, some modifications are required to make an NGV work efficiently. These changes are primarily in the fuel storage tank, the engine and the chassis (底盘 ). Advantages The biggest advantage of NGVs is that they reduce en
17、vironmentally harmful emissions. Natural-gas vehicles can achieve up to a 93 percent reduction in carbon monoxide emissions, 33 percent reduction in emissions of various oxides of nitrogen and a 50 percent reduction in reactive hydrocarbons when compared to gasoline vehicles. NGVs also rate higher i
18、n particulate matter 10 (PM10) emissions. PM10 particles transport and deposit toxic materials through the air. NGVs that operate in diesel applications can reduce PM10 emissions by a factor of 10. Natural-gas vehicles also offer these benefits: NGVs are safer. The fuel storage tanks on an NGV are t
19、hicker and stronger than gasoline or diesel tanks. There has not been an NGV fuel-tank rupture in more than two years in the United States. Natural gas costs are lower than gasoline. On average, natural gas costs one-third less than gasoline at the pump. Natural gas is convenient and abundant. A wel
20、l-established pipeline infrastructure exists in the United States to deliver natural gas to almost every urban area and most suburban areas. There are more than 1,300 NGV fueling stations in the United States, and more are being added every day. Natural gas prices have exhibited significant stabilit
21、y compared to oil prices. Historically, natural gas prices have exhibited significant price stability compared to the prices of petroleum-based fuels. This stability makes it easier to plan accurately for long-term costs. NGVs have lower maintenance costs. Because natural gas burns so cleanly, it re
22、sults in less wear and tear on the engine and extends the time between tune-ups and oil changes. Disadvantages One of the biggest complaints about NGVs is that they arent as roomy as gasoline cars. This is because NGVs have to give up precious cargo and trunk space to accommodate the fuel storage cy
23、linders. Not only that, these cylinders can be expensive to design and build-a contributing factor to. the higher overall costs of a Natural-gas vehicle compared to a gasoline-powered car. Another drawback is the limited driving range of NGVs, which is typically about half that of a gasoline-powered
24、 vehicle. For example, Hondas natural gas Civic, the Civic GX, can go up to 220 miles without refueling. A typical gasoline-powered Civic can go approximately 350.miles without refueling. If a dedicated NGV ran out of fuel on the road, it would have to he towed to the owners home or to a local natur
25、al gas refueling station, which might be harder to find than a “regular“ gas station. Finally, it should be noted that natural gas, like gasoline, is a fossil fuel and cannot be considered a renewable resource. While natural gas reserves in the United States are still considerable, they are not inex
26、haustible. Some predict that there are enough natural gas reserves remaining to last another 67.1 years, assuming that the 9,003 level of production continues. 2 This passage explains the basic idea of natural gas and compares the performances of different types of NGVs. （ A） Y （ B） N （ C） NG 3 The
27、basic principles applied to natural-gas vehicles are quite different from those applied to gasoline-powered vehicles. （ A） Y （ B） N （ C） NG 4 More and more people are found of NGVs because they help reduce deaths in car accidents to a great degree. （ A） Y （ B） N （ C） NG 5 The price of natural gas is
28、 cheaper and more stable than that of gasoline. （ A） Y （ B） N （ C） NG 6 Often associated with crude oil, natural gas is principally made up of _ and other hydrocarbon gases. 7 NGVs arent as roomy as gasoline cars because they have to give up cargo and trunk space to accommodate the _. 8 Both natural
29、 gas and gasoline are and thus neither can be considered renewable. 9 During the 19th century, natural gas was used on a local scale because of the difficult situation in_. 10 Natural gas trapped in underground reservoirs is extracted by _. 11 People resumed their interest in natural gas as a fuel a
30、s a result of _ of the late 1960s and early 1970s. Section A Directions: In this section, you will hear 8 short conversations and 2 long conversations. At the end of each conversation, one or more questions will be asked about what was said. Both the conversation and the questions will be spoken onl
31、y once. After each question there will be a pause. During the pause, you must read the four choices marked A, B, C and D, and decide which is the best answer. （ A） What the roommates name is. （ B） What the roommate wants in exchange for the tickets. （ C） How many tickets the roommate has. （ D） What
32、the roommate said before. （ A） He probably cant find the man a job in English department. （ B） He is a kind-hearted man. （ C） He is unwilling to help the man find a job. （ D） He is the one who decides which student to hire. （ A） The fine will be deducted from the womans credit card. （ B） The weather
33、 is still cool so they dont sell fans. （ C） Anyone returning overdue books this week faces no fine. （ D） The man is a friend of the woman so she wont be fined. （ A） He will show her the way on the map. （ B） He will take her to the police office. （ C） He will take her to her destination himself. （ D）
34、 He will ask someone else to help the woman. （ A） She suggests the man to go to a farther place to trim his hair. （ B） She offers to cut the mans hair herself at the price of 10. （ C） She tells the man a cheaper but busier place to have his hair cut. （ D） She used to trim her hair in a luxurious sal
35、oon. （ A） Order tickets via the Internet. （ B） Order tickets by going to the box office personally. （ C） Order tickets by writing a letter. （ D） Order tickets by calling the box office. （ A） She thinks the man should stay with his sister at home. （ B） She invites the man and his sister to her party.
36、 （ C） She will go with the man to meet his sister. （ D） She will cancel her party. （ A） She wants to know who said they wont. （ B） She also doubts whether they can finish on time. （ C） She asks the man to go with her. （ D） She is confident of completing all they wanted to. （ A） The food in the kitch
37、en. （ B） The TV Programme. （ C） The roommate of the man. （ D） The coming exam. （ A） Because they are not friends. （ B） Because he failed last exam. （ C） Because they are not in the same class. （ D） Because she has never told him about that. （ A） Because its too late. （ B） Because he doesnt know her.
38、 （ C） Because she is the best student. （ D） Because she is a friend of the woman. （ A） Because she wanted to know ii everything was OK with her parents. （ B） Because she wanted to invited her parents to Billys birthday party. （ C） Because she wanted to tell her parents that everything was OK with he
39、r children. （ D） Because she wanted to tell her parents that Tom was given a raise. （ A） He is raising funds for his company. （ B） He loves working on ears. （ C） He is Mr. Davis good friend. （ D） He has been rewarded for his work. （ A） One son and one daughter. （ B） Two sons and two daughters. （ C）
40、One son and two daughters. （ D） Two sons and two daughters. （ A） On May 24th. （ B） Not mentioned. （ C） On May 23rd. （ D） In July. Section B Directions: In this section, you will hear 3 short passages. At the end of each passage, you will hear some questions. Both the passage and the questions will b
41、e spoken only once. After you hear a question, you must choose the best answer from the four choices marked A, B, C and D. （ A） It conserves battery power. （ B） It lets your laptop rest. （ C） It makes your laptop easy to control. （ D） It replaces screen saver. （ A） Let the computer to rest. （ B） Sav
42、e power. （ C） Save time for re-launch. （ D） Leave projects in progress like they are. （ A） It may easily go wrong and any unsaved work disappears. （ B） It crashes the computer easily. （ C） It may attract the thunder. （ D） It consumes more power. （ A） The whole city becomes noisy. （ B） Its hard to fi
43、nd a cheap or vacant hotel room. （ C） It is too hot then. （ D） The crime rate increases. （ A） Fly to Amsterdam directly. （ B） Take the ship. （ C） Fly to London and take a coach. （ D） Buy ticket directly from the airlines. （ A） The bicycle is easily stolen. （ B） The roads are narrow and unsuitable fo
44、r bicycles. （ C） There are many ups and downs in the city so riding a bike is tiring. （ D） There are too many cars so its unsafe to ride a bike. （ A） Always. （ B） Once. （ C） Twice. （ D） Three times. （ A） 4.2 billion years ago. （ B） 3.3 billion years ago. （ C） 2.9 billion years ago. （ D） 1.2 billion
45、years ago. （ A） From rocks in the mountain. （ B） From the remains of ancient sea life. （ C） From the soil under the sea. （ D） From ancient trees. （ A） Because its shining. （ B） Because its rare. （ C） Because its expensive. （ D） Because it came from ancient times. Section C Directions: In this sectio
46、n, you will hear a passage three times. When the passage is read for the first time, you should listen carefully for its general idea. When the passage is read for the second time, you are required to fill in the blanks numbered from 36 to 43 with the exact words you have just heard. For blanks numb
47、ered from 44 to 46 you are required to fill in the missing information. For these blanks, you can either use the exact words you have just heard or write down the 36 In controlling your dreams the key words are【 S1】 _ , practice, effort, and【 S2】 _ . In the beginning you may be able to【 S3】 _ some c
48、ontrol in your dreams, such as changing the scene or situation, or controlling your own actions, but it will likely take you a while to gain【 S4】 _ control of your dreams. This is clue to the fact that it can be difficult to【 S5】 _ how much force to put into trying to change something. Sometimes the
49、 changes will【 S6】 _ easily; other times you may get frustrated if what you want to happen doesnt. It is【 S7】 _ that you dont allow yourself to become too【 S8】 _ or frustrated with your attempts at dream control because if you do youll likely wake yourself up. In order to be successful at changing your dreams you have to believe it is possible, If youre trying to do something in your dr
