大学六级-602及答案解析.doc

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1、大学六级-602 及答案解析(总分：710.00，做题时间：90 分钟)一、Part Writing(总题数：1，分数：103.00)1.Directions: For this part, you are allowed 30 minutes to write a short essay entitled On Television Advertisement. You should write at least 150 words following the outline given below:1. 电视节目总广告很多2. 广告的利与弊3. 我的观点On Television Adve

2、rtisement（分数：103.00）_二、Part Reading Compr(总题数：1，分数：70.00)HIV Vaccine Feat Leaves More Questions Than AnswersOnly hours after HIV vaccine researchers announced the achievement of a milestone that has eluded them for a quarter of a century, they began plotting their next stepsand coming back to realit

3、y. Their ultimate goal, halting the spread of AIDS, remains far in the future. A Thai and American team had announced early Thursday in Bangkok that they had found a combination of vaccines that provided modest protection against infection with HIV, offering the first proof of principle that the dea

4、dly disease could be tamed by teaching the immune system to recognize the virus and defeat it. Scientists around the world hailed the achievement.But by Thursday afternoon, the initial wave of joy had given way to the recognition that many questions will have to be answered before researchers can pr

5、oduce a vaccine that will reliably shield people from HIV. For starters, it could take years to figure out the biological mechanisms that produced the apparent 31% reduction in infections among those given the vaccine treatment.Researchers have never before observed antibodies(抗体) or other molecules

6、 in the blood that could block an infection of HIV, the virus that causes AIDS. Now they will try to figure out whether this combination of vaccines stimulated new molecules, or provoked an unusual blend of ones previously observed. Experts predicted that it would require 2 to 3 years of research to

7、 better understand how the vaccine worked, and an additional 5 to 10 years to produce a vaccine that was ready to test in people. Some researchers even wondered whether the apparent reduction in infections was simply a statistical mistake resulting from the small number of HIV cases observed in the

8、trial.The abundance of unanswered questions hasnt sapped the enthusiasm of many HIV researchers. After 26 years of seemingly futile research on vaccines, they have finally made some progress on demonstrating the feasibility of an HIV vaccine, said Dr. Anthony Fauci, director of the National Institut

9、e of Allergy and Infectious Diseases, which largely funded the $120-million study. “This is the first positive signalmodest though it may bethat we have ever got with any vaccine that we have ever tested in humans,“ Fauci said. But “is it a vaccine that is ready for prime time? No.“The Thai trial, w

10、hich began in 2003, had been laughed at by many critics as a waste of time and money because its two vaccines had produced no benefit in individual trials. But a few researchers speculated that using them togetherwith one vaccine priming (开始修复) the immune system and the second boosting that response

11、 would be more effective. The primer in this combination is Alvac, made by Sanofi Pasteur, which uses a harmless virus to carry three synthetic HIV genes into the body. The boost comes from Aidsvax, originally made by VaxGen Inc. and now owned by the nonprofit group Global Solutions for Infectious D

12、iseases. It contains a genetically engineered version of a protein from the HIV surface.The study, led by Dr. Supachai Rerks-Ngarm of the Thai Ministry of Public Healths Department of Disease Control, involved more than 16,000 volunteers in Thailand, all from the general population rather than from

13、a pool of high-risk homosexuals and drug users used in past studies. Half received four priming doses of Alvac and two boost doses of Aidsvax over a six-month period; the other half received placebo(无效对照药) shots. After three years of follow-up, new HIV infections were observed in 74 of the 8,198 peo

14、ple who received the placebo, but in only 51 of the 8,197 given the vaccine, a statistically significant 31% reduction.To the researchers disappointment, however, the vaccine did not reduce levels of HIV activity in those who became infected after being vaccinated. The trial was carried out in Thail

15、and because the initial research was conducted there and the vaccine was based on the version of HIV that circulates in that country. Full details of the study will be released next month at a conference in Paris, and researchers are eagerly awaiting them.Dr. Salim S. Abdool Karim, an epidemiologist

16、 at Columbia University in New York and director of the Centre for the AIDS Programme of Research in South Africa in Durban, said he was particularly eager to know whether people who got vaccinated and stayed healthy had a bigger response from the white blood ceils known as cellular T lyrnphocytes(淋

17、巴球). “A whole range of vaccines were developed on the hypothesis(假想) that they generated sufficient cellular T lymphocyte responses to prevent infection,“ he said. “Weve never been able to test that hypothesis because no vaccine has worked until now.“And if it is not the lymphocytes, then “what kind

18、 of compounds were the cells making when you inoculate them with the vaccine?“ asked Dr. Spyros Kalams an HIV immunology researcher at Vanderbilt University in Nashville and director of the HIV Vaccine Trials Program there. “Was it a compound that can kill infected cells? Does it make proteins that

19、stop the virus from replicating?“ Researchers now will begin the painstaking work of comparing the blood of those who were vaccinated and resisted infection and those who did not. Then they will look for molecules that are more abundant in the healthy people, Fauci said.Once researchers identify the

20、se so-called correlates of immunity, they can begin to look for ways to prompt the body to make themthe key to producing an effective vaccine. The Thai results are “an opening of a door to answer some very important questions,“ he said. But several scientists cautioned that there was no guarantee th

21、e Thai blood samples would reveal the biological secrets of HIV immunity. Surely some of the people who resisted HIV infection were protected by the vaccine, but not all, said Dr. Otto Yang, an immunologist at UCLAs David Geffen School of Medicine.Yang also expressed doubt that a combination of vacc

22、ines made the difference in those who benefited. He and others noted that this was the first large study to focus on a low-risk population. Perhaps transmitting the virus through heterosexual sex instead of directly into the bloodstream on an needle gives the immune system a better chance of fightin

23、g off infection. Although it is also unclear whether these particular vaccines could be used elsewhere in the world, scientists said that if they could figure out what made this combination work, they could localize the approach to other regions. The dominant HIV strains vary from region to region.A

24、t least 33 million people worldwide are infected with HIV and 25 million have died, the World Health Organization said. An estimated 7,500 are infected each day, emphasizing the need for a vaccine. There have been three previous vaccine trials in humans. Aidsvax had previously failed in two large tr

25、ials halted in 2003; both showed no benefit to recipients. Another trial by Merck Co. of a different vaccine was halted prematurely in 2007 when researchers found that the vaccine might increase the risk of contracting the virus.（分数：70.00）(1).According to Paragraph 1, we can learn that _.（分数：7.00）A.

26、scientists have made certain achievements in HIV vaccineB.HIV vaccine has been proved successful ultimatelyC.HIV vaccine has been proved uselessD.HIV has already been decoded and defeated(2).The achievements for HIV vaccine has been given discount because _.（分数：7.00）A.it causes a number of questions

27、 to answerB.it cant effectively protect people from HIVC.it cant be recognized by the peopleD.it is proved ineffective in treating HIV(3).The researchers are now trying to figure out _.（分数：7.00）A.whether observed antibodies can block the infection of HIVB.whether the combination of vaccines stimulat

28、es new moleculesC.whether the combination of vaccines can work wellD.whether the combination of vaccines could be tested in normal people(4).The researchers had taken the Thai trial to be more effective by _.（分数：7.00）A.injecting one vaccine for the immune systemB.injecting two vaccines to boost the

29、responsesC.injecting one vaccine for the immune system and another to boost the responsesD.putting three synthetic HIV genes into the body(5).The researchers were disappointed because _.（分数：7.00）A.the vaccines havent shown any effect on volunteers in ThailandB.the vaccines didnt stop the HIV infecti

30、on on those who were vaccinatedC.the vaccines were strongly rejected by the people in ThailandD.the vaccines effects is waiting to be verified at conference in Paris(6).According to Dr. Salim, which of the following statement is true?（分数：7.00）A.Some people who got vaccinated kept healthy.B.A number

31、of effective vaccines were developed just on the hypothesis.C.The hypothesis for vaccines has never worked well until now.D.The white blood cells are the root cause of HIV infection.(7).The researchers are looking afterwards for _.（分数：7.00）A.the proteins to stop HIV virusB.the blood of those who wer

32、e vaccinatedC.the blood of those who were not vaccinatedD.the molecules that are more abundant in healthy people(8).Verifying the correlates of immunity is the key to _.（分数：7.00）填空项 1:_(9).The vaccine made by Merck Co was halted in that it might _.（分数：7.00）填空项 1:_(10).This passage tells the breakthr

33、ough of HIV vaccine leaves us _.（分数：7.00）填空项 1:_三、Part Listening Com(总题数：0，分数：0.00)四、Section A(总题数：4，分数：105.00)A.Mike cant pass the exam.B.Mike doesnt need to study at all.C.Mike should get some fresh air in the morningD.Having a good rest will help Mike with the exam.A.Take the wallet to the recept

34、ion desk.B.Look for the owner of the wallet in the company.C.Ask the receptionist for help.D.Put the wallet back in the elevator.A.Professor Smith will help Mary to take the course simultaneously.B.Mary will probably postpone taking the course of statistics.C.Mary will require taking the accounting

35、course first.D.Mary will take the course of Professor Smith.A.To try playing a new game.B.Not to worry about his grades.C.To spend more time on his studies.D.To teach them how to play the games.A.He is not interested in the competition.B.He doesnt know if the super girl was successful.C.He cant foll

36、ow the state competition.D.He thinks the super girl of last week was eliminated.A.In a library.B.In a cinema.C.In a literature class.D.In a history class.A.She will be absent in the next class.B.She will help the professor hand out the course outline.C.She will copy the outline by herself.D.She will

37、 go to the office of the professor.A.Her brother wants to rent a room with another person.B.Her brother can take the man to the picnic.C.Her brother wants to share his room with another person.D.Her brother wants someone else to go to the picnic with him.Questions 19 to 22 are based on the conversat

38、ion you have just heard.（分数：28.00）A.In a company.B.In a studio.C.In a classroom.D.At the womans home.A.How to get successful in a job interview.B.What qualities a good interviewee should have?C.The importance of an interview.D.How to do well in a job?A.The behavior of the interviewee.B.The character

39、 of the interviewee.C.The tone of the interviewee.D.The appearance of the interviewee.A.Because it shows your politeness.B.Because it gives you another chance to emphasize your advantages.C.Because it will remind the interviewers of you.D.Because it is one of the ways you ask for the result of the i

40、nterview.Questions 23 to 25 are based on the conversation you have just heard.（分数：21.00）A.Write comments on the others works.B.Give advice to each other.C.Write poems.D.Publish new works.A.He met her once on the campus.B.He met her in the publishing house.C.He saw her name in the campus literary rev

41、iew.D.They are both in the Students Union.A.She will give lectures to them.B.She will persuade more professors to join the group.C.She will talk out her own experiences of publishing.D.She will list more people who might join the group.五、Section B(总题数：3，分数：70.00)Passage OneQuestions 26 to 29 are bas

42、ed on the passage you have just heard.（分数：28.00）A.Reformers suggestions.B.The coming of a large population from Europe.C.The expansion of industrial cities.D.The requirement of specific populations.A.Women and men studied in the same classes.B.The amount of time spent on formal education was limited

43、.C.New regulations were imposed on nontraditional education.D.Most places required children to attend school.A.Different groups needed different kinds of education.B.Special programs should be set up to modernize students.C.Women should stay at home.D.More women should be involved in education and i

44、ndustry.A.More goods were produced than needed.B.Less goods were produced than needed.C.Immigrant women couldnt enjoy the right of educational.D.Immigrant women raised a lot of children.Passage TwoQuestions 30 to 32 are based on the passage you have just heard.（分数：21.00）A.Grassland for animals.B.A l

45、and covered with trees.C.A steep slope of a hill.D.A land with fertile soil.A.To forbid grazing on marginal lands.B.To plant more trees on marginal lands.C.To establish good ground cover.D.To graze animals rotationally.A.Supporting the soil.B.Providing shade for animals.C.Loosening soil structure.D.

46、Protecting the soil from wind and rain damage.Passage ThreeQuestions 33 to 35 are based on the passage you have just heard.（分数：21.00）A.To honor women pioneers.B.To encourage the students to pursue their dreams.C.To honor the September 11 attack.D.To make more heroes.A.Because many of the boys in sin

47、gle parent families are raised by their mothers.B.Because many boys like the stories of women pioneers.C.Because boys are more negative than girls.D.Because many of the boys are from minority populations.A.The quantity of single parent family in America.B.The push of Maria Brennan.C.The September 11

48、 attack.D.The requirements of four schools.六、Section C(总题数：1，分数：77.00)When shopping online, it is important to bear a few basics in mind. Not only will these help keep you safe but they will also (36) you find the best bargains possible, regardless of what youre looking to buy. The Internet is a com

49、pletely different marketplace from live, face-to-face transacting, and this poses certain (37) 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 (38) site, make sure you check their (39) score or ratings to determine whether or not they are reliable. (40) if you happen