1、大学英语六级模拟试卷 753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 We Start Our Work-life or Go on with Our Education. You should write at least 150 words according to the outline given below in Chinese: 1. 许多大学生毕业生面
2、临着就业和深造的两难境地 2有人认为他们应该继续深造，有人认为他们应马上就业 3你的看法 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
3、 agrees with the information 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 refe
4、rring to cars, his observation 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
5、consumption. As gasoline 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
6、 low cost of ownership. 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, sti
7、cky liquid mixture of 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 la
8、nd plants and aquatic (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
9、 of methane (沼气 ) and 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 i
10、s combustible (易燃的 ), 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
11、 with diamond-studded 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 po
12、ssible to transport gas 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 natur
13、al gas a viable energy 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
14、 United States. Honda 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
15、 vehicles. In other words, 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 tem
16、peratures. NGVs themselves 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 i
17、s that they reduce environmentally 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. NG
18、Vs also rate higher in 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
19、tanks on an NGV are thicker 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 convenien
20、t and abundant. A well-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
21、 significant stability 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 bu
22、rns so cleanly, it results 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 accommodat
23、e the fuel storage cylinders. 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
24、of a gasoline-powered 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 hom
25、e or to a local natural 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 considerab
26、le, they are not inexhaustible. 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
27、（ B） N （ C） NG 3 The 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 pr
28、ice of natural gas is 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
29、the _. 8 Both natural 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 na
30、tural gas as a fuel as 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 questio
31、ns will be spoken only 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） It is cancelled. （ B） It is booked up. （ C） There is no flight to Paris on Saturday. （ D） There is only one Monday
32、flight to Paris. （ A） Jim and Bruce copied each others assignments. （ B） Both of their handwritings are difficult to read. （ C） Jim and Bruce did the assignments by themselves （ D） John did the assignments for Jim and Bruce. （ A） He feels hurried to deliver the car. （ B） Hes too slow in getting the
33、car ready. （ C） He should have delivered the car two days ago. （ D） He is having a trial driving himself. （ A） She didnt call to explain at all. （ B） She didnt like to come for dinner. （ C） She didnt have time to make the call. （ D） She hoped to come for dinner next time. （ A） Ate all the food. （ B）
34、 Cleaned the kitchen. （ C） Fixed the refrigerator. （ D） Bought some groceries. （ A） Saying farewell to a friend. （ B） Buying a ticket for a sports event. （ C） Paying a bill at the bank. （ D） Arranging for a plane trip. （ A） Susan thanked Bob for taking the picture. （ B） The school sent pictures to a
35、ll of the teachers. （ C） The envelope contained two letters and a picture. （ D） The letters were addressed to the faculty. （ A） His watch is always accurate. （ B） Hes supposed to arrive at 3:45. （ C） He forgot to look at his watch. （ D） He failed to make his appointment on time. （ A） To take part in
36、 an English Summer Camp. （ B） To travel around the whole Europe. （ C） To teach the students in poor areas. （ D） To visit the places with historical significance in America. （ A） He has never been to Gettysburg. （ B） He took a political science course. （ C） His family still goes on vacation together.
37、 （ D） Hes interested in the Civil War. （ A） Why his parents wanted to go to Gettysburg. （ B） Why his familys vacation plans changed ten years ago. （ C） Where his family went for a vacation ten years ago. （ D） When his family went on their last vacation. （ A） Frank. （ B） Modest. （ C） Indirect. （ D） C
38、onfident. （ A） Money is important. （ B） Responsibility means more than salary. （ C） High salary secures better performance. （ D） Future income is more important than starting salary. （ A） Can do spirit. （ B） Motivation and teamwork. （ C） Honesty and responsibility. （ D） Hard-working and cooperation.
39、 （ A） Tolerance. （ B） Civilization. （ C） Clearer wording. （ D） Communication. 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 be spoken only once. After you hear a question, you m
40、ust choose the best answer from the four choices marked A, B, C and D. （ A） The World War II. （ B） The World War I. （ C） The American Revolution. （ D） The Industrial Revolution of Britain. （ A） The telescope. （ B） The harmonica. （ C） The piano. （ D） The light bulb. （ A） To bring electricity into his
41、 house for lighting. （ B） To have fun. （ C） To attract thunder. （ D） To conduct a scientific experiment. （ A） Business executives, housewives and college students. （ B） Parents planning for their childrens education. （ C） Adults with or without full employment, students, housewives, and retired peop
42、le. （ D） Best customers only. （ A） Its promise to offer services not available at other banks. （ B） Its offer of free gifts to its customers. （ C） Its description in detail of the services and facilities that the bank provides. （ D） Its completely new attitude to banking. （ A） Banks should introduce
43、 higher rates for savings accounts to attract customers. （ B） People of all ages are eager to receive something for nothing. （ C） TV advertisements are more effective than advertisements in newspapers and journals. （ D） To advertise for a bank is quite a tough job. （ A） A housewife. （ B） A singer. （
44、 C） A teacher. （ D） A musician. （ A） The violin was too heavy for her. （ B） She was too young to play the violin. （ C） The violin was too expensive. （ D） Her mother wanted her to play the piano. （ A） To play the violin on a concert. （ B） To go to New York City. （ C） To apply for a scholarship. （ D）
45、To have her performance taped. （ A） In 1928. （ B） In 1982. （ C） In 1980. （ D） In 1920. Section C Directions: In this section, 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 ti
46、me, you are required to fill in the blanks numbered from 36 to 43 with the exact words you have just heard. For blanks numbered 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 When shoppi
47、ng online, it is important to bear a few basics in mind. Not only will these help keep you safe but they will also【 B1】 _ you find the best bargains possible, regardless of what youre looking to buy. The Internet is a completely different marketplace from live, face-to-face transacting, and this pos
48、es certain【 B2】 _ problems. Firstly, make sure you know you can trust the seller. If youre buying from a private individual through an independent selling platform like an online【 B3】 _ site, make sure you check their【 B4】 _ score or ratings to determine whether or not they are reliable.【 B5】 _ if y
49、ou happen to buy from an online company, or branded website, make sure they are【 B6】 _ and carry secure ordering facilities. That way, youre less likely to get【 B7】 _ off by some unscrupulous seller, or to suffer from credit card【 B8】 _ At the end of the day,【 B9】 _ , so make sure you have something concrete to suggest the sellers reliability before handing over your details. Overall,【
