1、大学英语六级 28及答案解析(总分：448.01，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 thirty minutes to write a letter. Suppose you are Li Ming, write Professor Wang, your former teacher, ask him to write you a letter of recommendation. You should write at least 150 words accordin
2、g to the suggestions given below in Chinese. 1.告诉他你是谁。 2.你请求他做什么以及原因。 3.表示感谢。 （分数：30.00）_二、Part II Reading C(总题数：1，分数：71.00)Space Tourism Make your reservations now. The space tourism industry is officially open for business, and tickets are going for a mere $20 million for a one-week stay in space.
3、 Despite reluctance from National Air and Space Administration (NASA) , Russia made American businessman Dennis Tito the worlds first space tourist. Tito flew into space aboard a Russian Soyuz rocket that arrived at the International Space Station (ISS) on April 30, 2001. The second space tourist, S
4、outh 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 to 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 paymen
5、t. 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 industry. There are already several space tourism companies planning to build suborbital vehicles and orbital cities within the ne
6、xt 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 concluding that selling trips into space to private citizens could be worth billions of dollars. A Japanese report supports these findings
7、, 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 agencies, who are concerned with safety and the development of a reliable, reusable launch vehicle. Space Accommodations Russias Mi
8、r 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 turned out, bringing down Mir only temporarily delayed the first tourist trip into space. The Mir crash did cancel plans for a n
9、ew 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 were to go through training at Russias cosmonaut (宇航员) training center, Star City. Each week, one of the participants would be elim
10、inated 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 tourism until the International Space Station is completed in 2006. Russia is not alone in its interest in space tourism. There are s
11、everal 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, rotating “commercial space infrastructure (基础结构)“ that will resemble the Discovery spacecraft in the movie “2001: A Space Odyss
12、ey. “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 above Earth. The space city will rotate once per minute to create a gravitational pull one-third as strong as Earths. -According to
13、 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 spaceports both on Earth and in space, to and from private space stations, and aboard dozens of different vehicles.“ -Even Hilton Hotels
14、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 hotel is 15 to 20 years away. Initially, space tourism will offer simple accommodations at best. For instance, if the International
15、 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 entertainment. However, the first generation of space hotels should offer tourists a much more comfortable experience. In regard to
16、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 not. The small gravitational pull created by the rotating space city would allow space-tourists and residents to walk around and f
17、unction normally within the structure. Everything from running water to a recycling plant to medical facilities would be possible. Additionally, space tourists would even be able to take space walks. Many of these companies believe that they have to offer an extremely enjoyable experience in order f
18、or 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 Vacation Will space be an exotic retreat reserved for only the wealthy? Or will middle-class folks have a chance to take their f
19、amilies 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. Currently, the only vehicles that can take you into space are the space shuttle and the Russian Soyuz, both of which are terribly
20、 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 $10,000 to put into Earths orbit. NASA and Lockheed Martin are currently developing a single-stage-to-orbit launch space plane, call
21、ed 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 afford to take a trip into space would move into the millions. In 1998, a joint report from NASA and the Space Transportation Associa
22、tion 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 concluded that at a ticket price of $50,000, there could be 500,000 passengers flying into space each year. While still leaving out many
23、 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 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
24、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：7.10）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).Th
25、e 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 private 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
26、).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 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
27、 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 as common as intercity air travel.（分数：7.10）_三、Listening Comprehens(总题数：1，分数：15.00)A.The man should try to be more understanding.B
28、.The mans wife should be more understanding.C.The mans negative attitude may be derived from his childhood.D.The pessimism of mans wife may be the result of her past experiences.A.Whether the woman needs his help.B.Whether the woman has any pets.C.Where the woman is going.D.Whether the woman can tak
29、e care of his pet.A.Mary earned the prize.B.Mary has granted the prize.C.Mary fails in the speech contest.D.Mary shouldnt earn the prize.A.It does not concern John.B.John does not care about his car.C.John will help him fix the car.D.He wants John to fix the car.A.No one knows how Mary gets to work.
30、B.She doesnt think the record player works.C.She throws the old record away.D.Its surprising that Mary could repair the record player.A.She didnt go to work this morning.B.She was injured and had to go to the hospitalC.She talked with the boss in the morning.D.The traffic delayed her.A.She loves her
31、 present work.B.She is going to open a store.C.She is about to retire.D.She works in a repair shop.A.She is against the mans plan.B.She thinks it needs a lot of money.C.They need some time to think about it.D.Its good for his career development.四、Section A(总题数：2，分数：10.00)A.A new fuel for buses.B.The
32、 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 difficult in the city.D.The cost of fuel has increased.A.A fuel that burns cleanly.B.An oil additive that helps co
33、ol 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 production.C.The lack of trained environmental engineers.D.The opposition of automobile manufacturers.A.Two diffe
34、rent types of bones in the human body.B.How bones help the body move.C.How bones continuously repair themselves.D.The chemical composition of human bones.A.They defend the bone against viruses.B.They prevent oxygen from entering the bone.C.They break down bone tissue.D.They connect the bone to muscl
35、e tissue.A.They have difficulty identifying these cells.B.They arent sure how these cells work.C.Theyve learned how to reproduce these cells.D.Theyve found similar cells in other species.A.To learn how to prevent a bone disease.B.To understand differences between bone tissue and other tissue.C.To fi
36、nd out how specialized bone cells have evolved.D.To create artificial bone tissue.五、Section B(总题数：3，分数：30.00)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 e
37、xplored 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.A.Separate
38、 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 ice was cut and handled with the help of some special tools.B.The ice was taken from the flowing river with hooks and
39、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.Axes, saws, choppers, tongs, hooks.C.Choppers, axes, saws, hooks, tongs.D.Axes, saws, choppers, hooks, tongs.A.Family
40、phone numbers.B.Government service phone numbers.C.Business phone numbers.D.Professional services phone numbers.A.People can call you back if necessary.B.You can dial a special number free.C.You dont need to pay for long distance call.D.You can get a credit coupon when you give the phone number.A.He
41、 will find out the right number for you.B.He will charge you less for the wrong number.C.He will charge you no money for the wrong number.D.He will tell you what the wrong number is.六、Section C(总题数：1，分数：10.00)It is often claimed that nuclear energy is something we cannot do without. We live in a con
42、sumer society where there is an enormous demand for commercial products of all kinds. (36) 1, an increase in industrial production is considered to be one solution to the problem of (37) 2 unemployment. Such an increase (38) 3 an abundant and cheap energy supply. Many people believe that nuclear ene
43、rgy provides an (39) 4and economical source of power and that it is (40) 5essential for an industrially developing society. There are a number of other advantages in the use of nuclear energy. Firstly, nuclear power, except for accidents, is clean. A further advantage is that a nuclear power station
44、 can be run and (41) 6by relatively few technical and administrative staff. The nuclear reactor (42) 7an enormous step in our scientific evolution and, whatever the anti-nuclear group says, it is wrong to expect a return to more (43) 8sources of fuel. However, (44) 9. Furthermore, it is questionable
45、 whether ultimately nuclear power is a cheap source of energy. There have, for example, been very costly accidents in America, in Britain and, of course, in Russia. The possibility of increases in the cost of uranium in addition to the cost of greater safety provisions could price nuclear power out
46、of the market. (45) 10. Thus, if we wish to survive, we cannot afford nuclear energy. In spite of the case against nuclear energy outlined above, nuclear energy programmes are expanding. (46) 11. However, it is doubtful whether this growth will or can continue. Having weighed up the arguments on bot
47、h sides, it seems there are good economic and ecological reasons for sources of energy other than nuclear power. （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)To emphasize the stagnation (死气沉沉) and the narrowness of the
