1、大学英语六级 18及答案解析(总分：448.02，做题时间：135 分钟)一、Part I Writing (3(总题数：1，分数：30.00)1.For this part you are allowed 30 minutes to write a composition on the topic The Town I Live in. You should write at least 150 words.（分数：30.00）_二、Part II Reading C(总题数：1，分数：71.00)Space Tourism Make your reservations now. The s
2、pace tourism industry is officially open for business, and tickets are going for a mere $20 million for a one-week stay in space. Despite reluctance from National Air and Space Administration (NASA) , Russia made American businessman Dennis Tito the worlds first space tourist. Tito flew into space a
3、board a Russian Soyuz rocket that arrived at the International Space Station (ISS) on April 30, 2001. The second space tourist, South African businessman Mark Shuttleworth, took off aboard the Russian Soyuz on April 25,2002, also bound for the ISS. Lance Bass of N Sync was supposed to be the third t
4、o make the $20 million trip, but he did not join the three-man crew as they blasted off on October 30,2002, due to lack of payment. Probably the most incredible aspect of this proposed space tour was that NASA approved of it. These trips are the beginning of what could be a profitable 21st century i
5、ndustry. There are already several space tourism companies planning to build suborbital vehicles and orbital cities within the next two decades. These companies have invested millions, believing that the space tourism industry is on the verge of taking off. In 1997, NASA published a report concludin
6、g that selling trips into space to private citizens could be worth billions of dollars. A Japanese report supports these findings, and projects that space tourism could be a $10 billion per year industry within the next two decades. The only obstacles to opening up space to tourists are the space ag
7、encies, who are concerned with safety and the development of a reliable, reusable launch vehicle. Space Accommodations Russias Mir space station was supposed to be the first destination for space tourists. But in March 2001, the Russian Aerospace Agency brought Mir down into the Pacific Ocean. As it
8、 turned out, bringing down Mir only temporarily delayed the first tourist trip into space. The Mir crash did cancel plans for a new reality-based game show from NBC, which was going to be called Destination Mir. The Survivor-like TV show was scheduled to air in fall 2001. Participants on the show we
9、re to go through training at Russias cosmonaut (宇航员) training center, Star City. Each week, one of the participants would be eliminated from the show, with the winner receiving a trip to the Mir space station. The Mir crash has ruled out NBCs space plans for now. NASA is against beginning space tour
10、ism until the International Space Station is completed in 2006. Russia is not alone in its interest in space tourism. There are several projects underway to commercialize space travel. Here are a few of the groups that might take tourists to space: -Space Island Group is going to build a ring-shaped
11、, rotating “commercial space infrastructure (基础结构)“ that will resemble the Discovery spacecraft in the movie “2001: A Space Odyssey. “Space Island says it will build its space city out of empty NASA space-shuttle fuel tanks (to start, it should take around 12 or so) , and place it about 400 miles ab
12、ove Earth. The space city will rotate once per minute to create a gravitational pull one-third as strong as Earths. -According to their vision statement, Space Adventures plans to “fly tens of thousands of people in space over the next 10-15 years and beyond, around the moon, and back, from spacepor
13、ts both on Earth and in space, to and from private space stations, and aboard dozens of different vehicles.“ -Even Hilton Hotels has shown interest in the space tourism industry and the possibility of building or co-funding a space hotel. However, the company did say that it believes such a space ho
14、tel is 15 to 20 years away. Initially, space tourism will offer simple accommodations at best. For instance, if the International Space Station is used as a tourist attraction, guests wont find the luxurious surroundings of a hotel room on Earth. It has been designed for conducting research, not ent
15、ertainment. However, the first generation of space hotels should offer tourists a much more comfortable experience. In regard to a concept for a space hotel initially planned by Space Island, such a hotel could offer guests every convenience they might find at a hotel on Earth, and some they might n
16、ot. The small gravitational pull created by the rotating space city would allow space-tourists and residents to walk around and function normally within the structure. Everything from running water to a recycling plant to medical facilities would be possible. Additionally, space tourists would even
17、be able to take space walks. Many of these companies believe that they have to offer an extremely enjoyable experience in order for passengers to pay thousands, if not millions, of dollars to ride into space. So will space create another separation between the haves and have-nots? The Most Expensive
18、 Vacation Will space be an exotic retreat reserved for only the wealthy? Or will middle-class folks have a chance to take their families to space? Make no mistake about it, going to space will be the most expensive vacation you ever take. Prices right now are in the tens of millions of the dollars.
19、Currently, the only vehicles that can take you into space are the space shuttle and the Russian Soyuz, both of which are terribly inefficient. Each spacecraft requires millions of pounds of fuel to take off into space, which makes them expensive to launch. One pound of payload (有效载重) costs about $10
20、,000 to put into Earths orbit. NASA and Lockheed Martin are currently developing a single-stage-to-orbit launch space plane, called the Venture-Star, that could be launched for about a tenth of what the space shuttle costs to launch. If the Venture-Star takes off, the number of people who could affo
21、rd to take a trip into space would move into the millions. In 1998, a joint report from NASA and the Space Transportation Association stated that improvements in technology could push fares for space travel as low as $50,000, and possibly down to $20,000 or $10,000 a decade later. The report conclud
22、ed that at a ticket price of $50,000, there could be 500,000 passengers flying into space each year. While still leaving out many people, these prices would open up space to a tremendous amount of traffic. Since the beginning of the space race, the general public has said, “Isnt that great when do I
23、 get to go?“ Well, our chance might be closer than ever. Within the next 20 years, space planes could be taking off for the Moon at the same frequency as airplanes flying between New York and Los Angeles. （分数：71.00）(1).Lance Bass wasnt able to go on a tour of space because of health problems.（分数：7.1
24、0）A.YB.NC.NG(2).Several tourism companies believe space travel is going to be a new profitable industry.（分数：7.10）A.YB.NC.NG(3).The space agencies are reluctant to open up space to tourists.（分数：7.10）A.YB.NC.NG(4).Two Australian billionaires have been placed on the waiting list for entering space as p
25、rivate passengers.（分数：7.10）A.YB.NC.NG(5).The prize for the winner in the fall 2001 NBC TV game show would have been_.（分数：7.10）_(6).Hilton Hotels believes it wont be long before it is possible to build a_.（分数：7.10）_(7).In order for space tourists to walk around and function normally, it is necessary
26、for the space city to create a_.（分数：7.10）_(8).What makes going to space the most expensive vacation is the enormous cost involved in_.（分数：7.10）_(9).Each year 500,000 space tourists could be flying into space if ticket prices could be lowered to_.（分数：7.10）_(10).Within the next two decades, _could be
27、as common as intercity air travel.（分数：7.10）_三、Listening Comprehens(总题数：1，分数：15.00)A.Looking for a new job.B.Taking a suburban excursion.C.Looking for an apartment.D.Asking the man to do her a favor.A.8. 5 hours.B.7. 5 hours.C.8 hours.D.9 hours.A.Change the walls color.B.Rearrange the furniture.C.Buy
28、 some fine furniture.D.Hang some pictures.A.He may see Alan in Italy.B.He was looking for Alan in the library.C.Hes not sure which way to go.D.He may have made a mistake.A.Wait for the lecture to begin.B.Go immediately to their seats.C.Get something to drink first.D.Sit down and enjoy the lecture.A.
29、He doesnt think hell do that.B.He finds it easy to do that.C.He has no time to do that.D.He can help her.A.She doesnt need an umbrella.B.She left her umbrella in the car.C.She can hold her umbrella over the mans head.D.Shes the only one who doesnt have an umbrella.A.Its too windy.B.The people there
30、are terrible.C.The air is polluted.D.The beaches are dirty.四、Section A(总题数：2，分数：10.00)A.A new fuel for buses.B.The causes of air pollution.C.A way to improve fuel efficiency in buses.D.Careers in environmental engineering.A.Her car is being repaired.B.She wants to help reduce pollution.C.Parking is
31、difficult in the city.D.The cost of fuel has increased.A.A fuel that burns cleanly.B.An oil additive that helps cool engines.C.A material from which filters are made.D.An insulating material sprayed on engine parts.A.The high temperatures required for its use.B.The high cost of materials used in its
32、 production.C.The lack of trained environmental engineers.D.The opposition of automobile manufacturers.A.Dont write the character reference for Alex.B.Dont tell the truth about Alex in the character reference.C.To go out and have coffee with her.D.To go to the restaurant with her.A.He likes kids and
33、 has worked in a childrens camp.B.He is lazy and immature but good in a crisis.C.He quarrels with everyone he works with.D.He is immature and loves playing tricks on people.A.Alan thought Sally was too hard on Alex.B.Alan liked Alex very much and would write him a very good reference.C.Alan would tu
34、rn down Alexs request.D.Alan could see something good even in a very bad person.五、Section B(总题数：3，分数：30.00)A.Separate houses were built for storing ice.B.Double walls were built in icehouses to keep cool.C.Blocks of ice were packed with hay in icehouses.D.Ice was put into icehouses in winter.A.The i
35、ce was cut and handled with the help of some special tools.B.The ice was taken from the flowing river with hooks and carried by sleds to icehouses.C.The ice was carried on the frozen surface of the pond or river.D.The ice was sawed into even blocks by workers.A.Saws, choppers, axes, tongs, hooks.B.A
36、xes, saws, choppers, tongs, hooks.C.Choppers, axes, saws, hooks, tongs.D.Axes, saws, choppers, hooks, tongs.A.He set up the first university in America.B.He was one of the earliest settlers in America.C.He can best represent the spirit of early America.D.He was the most distinguished diplomat in Ame
37、rican history.A.He provided Washington with a lot of money.B.He persuaded France to support Washington.C.He served as a general in Washingtons army.D.He represented Washington in negotiations with Britain.A.As one of the greatest American scholars.B.As one of Americas most ingenious inventors.C.As o
38、ne of the founding fathers of the United States.D.As one of the most famous activists for human rights.A.It limited their supply of food.B.It killed many baby bald eagles.C.It destroyed many of their nests.D.It made their eggshells too fragile.A.They brought in bald eagles from Canada.B.They explore
39、d new ways to hatch baby bald eagles.C.They developed new types of feed for baby bald eagles.D.They found ways to speed up the reproduction of bald eagles.A.Pollution of the environment.B.Over-killing by hunters.C.Destruction of their natural homes.D.A new generation of pest killers.六、Section C(总题数：
40、1，分数：10.00)Adults are getting smarter about how smart babies are. Not long ago, researchers learned that 4-day-olds could understand (36) 1and subtraction. Now, British research (37) 2 Graham Schafer has discovered that infants can learn words for uncommon things long before they can speak. He found
41、 that 9-month-old infants could be taught through repeated show-and-tell to(38) 3 the names of objects that were foreign to them, a result that (39) 4in some ways, the received (40) 5that apart from learning to (41) 6things common to their daily lives, children dont begin to build vocabulary until w
42、ell into their second year. “ Its no (42) 7that children learn words, but the words they tend to know are words linked to (43) 8situations in the home, “ explains Schafer. “ (44) 9with an unfamiliar voice giving instructions in an unfamiliar setting. Figuring out how humans acquire language may shed
43、 light on why some children learn to read and write later than others, Schafer says, and could lead to better treatments for developmental problems. (45) 10. “ Language is a test case for human cognitive development,“ says Schafer. But parents eager to teach their infants should take note; (46) 11.
44、“This is not about advancing development, “ he says. “Its just about what children can do at an earlier age than what educators have often thought.“ （分数：10.00）填空项 1:_填空项 1:_填空项 1:_填空项 1:_填空项 1:_填空项 1:_填空项 1:_填空项 1:_填空项 1:_填空项 1:_填空项 1:_七、Reading Comprehensio(总题数：2，分数：177.00)Researchers generally agr
45、ee that acid rain arises primarily from the burning of coal and oil. The emissions contain oxides of nitrogen and sulfur, which can be carried hundreds of miles on the prevailing westernly winds. They eventually return to earth as dry gases and particulates and react with ground waters to form nitri
46、de or sulfuric acid. They may also be converted to the acids in the atmosphere by chemical processes that are still not fully understood. However the acids are formed, they have already been charged with a substantial list of damages. Corrosion of metal structures in windward areas of the country has been well-documented, but is a relatively minor entry on the list. Other forms of damage are far more insidious and longer-lasting. There is evidence, for example, that the acids leach heavy metals-aluminum, lead, and mercury-from the soil, which then poison plant roots and deprive them
