GRE-88及答案解析.doc

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1、GRE-88及答案解析(总分：44.00，做题时间：90 分钟)一、SECTION 1(总题数：16，分数：24.00)1.Which of the following sets of numbers has the greatest standard deviation?A. 2, 3, 4 B. 2.5, 3, 3.5C. 1, 1.25, 1.5 D. -2, 0, 2E. -20, 21, 21.5（分数：1.00）A.B.C.D.E.2.In a group of 100 students, more students are on the fencing team than are

2、 members of the French club. If 70 are in the club and 20 are neither on the team nor in the club, what, is the minimum number of students who could, be both on the team and in the club?A. 10 B. 49 C. 50D. 60 E. 61（分数：1.00）A.B.C.D.E.3.In a normal distribution, 68% of the scores lie within one standa

3、rd deviation of the mean. If the SAT scores of all the high school juniors in Center City followed a normal distribution with a mean of 500 and a standard deviation of 100, and if 10,200 students scored between 400 and 500, approximately how many students scored above 600?A. 2,400 B. 4,800 C. 5.100D

4、. 7,200 E. 9,600（分数：1.00）A.B.C.D.E.CORPORATE SUPPORT FOR THE ARTS BY SECTOR IN 1988 AND 1991（分数：3.00）(1).Approximately how many million dollars more did the wholesale sector contribute to the arts in 1988 than in 19917A. 10.4 B. 12.6 C. 14.0D. 16.5 E. 19.2（分数：1.00）A.B.C.D.E.(2).From 1988 to 1991 whi

5、ch corporate sector decreased its support for the arts by the greatest dollar amount?A. Services B. ManufacturingC. Retail D. WholesaleE. Other（分数：1.00）A.B.C.D.E.(3).Of the retail sectors 1991 contribution to the arts, went to symphony orchestras and （分数：1.00）A.B.C.D.E.4.If the circumference of the

6、circle above is 16, and if the length of AC equals the length of BD, what is the length of AC?A. B.16 C. （分数：1.00）A.B.C.D.E.It sounds like the premise for a science fiction novel, but scientists are today developing a drug that could eliminate traumatic events from our memories. Thus far the researc

7、h is focused on altering memories immediately following one particular type of trauma, car accidents, with promising results. But the potential applications of the research are far more wide reaching and morally ambiguous. On one hand, such a drug could provide a breakthrough in the treatment of pos

8、t-traumatic stress disorder in war veterans and rape victims. On the other hand, by relegating our memories to oblivion, such a drug could fundamentally change our sense of self and personal history. It is unclear how the human brain stores memories, and much is unknown about why painful memories of

9、 traumatic events come back to haunt some and not others. But one thing is certain-as research into the technology of altering memories continues, so will the ethical debates on whether this pharmaceutical innovation falls outside the spectrum of appropriate medical interventions.（分数：4.00）(1).The ma

10、in point of the passage is toA. describe the premise of a science fiction novelB. propose a remedy for traumatic brain injuriesC. question certain medical researchD. admit to the failings of pharmaceutical innovationE. reject the concept of drug trials（分数：1.00）A.B.C.D.E.(2).Which of the following ca

11、n be inferred from the passage regarding research into the memory-altering drug?A. It is currently applicable to many types of traumatic situations.B. Research is ongoing, and the treatment remains controversial.C. Our sense of self as well as our personal history is essentially static.（分数：1.00）A.B.

12、C.(3).Select the sentence that mentions a specific moral dilemma resulting from the use of a memory-altering drug.（分数：1.00）填空项 1:_(4).It can be inferred from the passage thatA. scientists have discovered a means by which human memories can be completely eliminatedB. only drugs that affect memory are

13、 morally ambiguousC. ethical debates are a predictable result of certain types of scientific research（分数：1.00）A.B.C.5.A certain doctor suggests that an individuals daily water intake be ounce per pound of body weight plus 8 ounces for every 25 pounds by which the individual exceeds his or her ideal

14、weight. If this doctor suggests a daily water intake of 136 ounces for a particular 240-pound individual, how many pounds above his or her ideal weight is that individual?A. （分数：1.00）A.B.C.D.E.（分数：2.00）(1).At the time during year X when the difference between the price of ABC common stock and the pr

15、ice of XYZ common stock was at its greatest, the price of XYZ common stock was approximately what percent of the price of XYZ common stock and ABC common stock combined?A. 16% B. 30% C. 36%D. 42% E. 103%（分数：1.00）A.B.C.D.E.(2).At the time during year X when the aggregate price of ABC and XYZ stock wa

16、s the greatest, the price of ABC stock was approximately what percent of the price of XYZ stock?A. 25 B. 60 C. 70D. 140 E. 170（分数：1.00）A.B.C.D.E.Thousands, perhaps even millions, of people around the world are afflicted with a neurological condition called synesthesia. The word synesthesia comes fro

17、m the Greek words syn, which means “together,“ and aisthesis, which means “perception or sensation.“ Those affected by the disorder experience an involuntary, simultaneous joining of two senses; for example, some synesthetes-people with synesthesia- perceive words as colors. Researchers do not know

18、the causes of synesthesia, nor do they fully understand the mechanisms of the disorder. However, some scientists believe that synesthesia results from crossed connections in the brain; synapses that are traditionally associated with one sensory system have somehow crossed over into another sensory s

19、ystem, which leads to a juxtaposition of two, typically unrelated senses. Synesthetic perceptions are idiosyncratic, and are as varied as the perceivers themselves. Theoretically, the number of types of synesthesia is bound only by the sensory pairings themselves, such as the color/sound pairing men

20、tioned previously. Researchers estimate that there could be as many as 35 different broad pairings- sound/touch, taste/hearing, and so on-each characterized by many permutations and unique features. Indeed the variations could be endless, with each synesthete perceiving a slightly different color or

21、 sensation, for example. Although the perceptions vary among individuals, according to Dr. Richard Cytowic, a leading synesthesia expert, the lifelong inter-sensory associations of the synesthetes remain stable, no matter what senses are joined in a given synesthete.（分数：3.00）(1).The primary purpose

22、of the passage is toA. describe a medical condition that might be difficult to recognize even though it is clearly definedB. propose a radical new treatment for a medical condition that was once thought untreatableC. question the accuracy of the current definition of a well-known medical conditionD.

23、 reject one explanation of a complex phenomenon in favor of anotherE. admit several weaknesses in the current theoretical approach to a complex medical condition（分数：1.00）A.B.C.D.E.(2).Select the sentence that best describes the scope of the sensory disorder.（分数：1.00）填空项 1:_(3).According to the passa

24、ge, each of the following statements regarding synesthesia is true EXCEPTA. researchers have not yet fully explained the mechanisms behind synesthesiaB. synesthetic perceptions are unique to the individual synestheteC. the term synesthesia derives from a combination of Greek root wordsD. the various

25、 permutations of synesthesia suggest that individuals experience shifting inter-sensory associationsE. researchers have so far failed to catalog all of the various sensory pairings experienced by synesthetes（分数：1.00）A.B.C.D.E.6.George earned 80, 85 and 90 on the first three tests in his geography cl

26、ass. Because he didnt have time to study, he decides to guess randomly on the final test. That test has ten true-false questions, each worth 10 points. What is the probability his final average is more than 85?（分数：1.00）A.B.C.D.E.7.There are 100 people on a line. Aviva is the 37th person and Naomi is

27、 the 67th person. If a person on line is chosen at random, what is the probability that the person is standing between Aviva and Naomi?（分数：1.00）填空项 1:_8.If x is 1, 2, or 3 and y is either 2 or 4, then the product xy can have how many different possible values?A.Three B. Four C. FiveD. Six E. Seven（分

28、数：1.00）A.B.C.D.E.9.If a and b are the lengths of the legs of a right triangle whose hypotenuse is 10 and whose area is 20,what is the value of (a +b.2?A. 100 B. 120 C. 140D.180 E.200（分数：1.00）A.B.C.D.E.10.In the world of art, distinguishing the authentic piece from the forgery is not an easy feat and

29、 often requires the use of multiple experts. Millions of dollars can be at stake, yet even experts can be fooled. However, a recent discovery has introduced a new resource for galleries and other groups seeking to establish the origins of their paintings: mathematicians. Math experts were able to an

30、alyze digital images of authenticated paintings where they found consistent differences in paint texture. This consistency suggests that each artist has a unique style of brush stroke that cannot be completely duplicated.In the first two sentences of the passage, the author suggests which of the fol

31、lowing?A. It is nearly impossible to determine whether a painting is authentic or fake without the use of math.B. Even if multiple experts from various fields analyze a painting, it is not always possible to determine its authenticity.C. New discoveries in art always lead to a greater degree of trut

32、h.D. Art can be difficult to analyze, but mathematical models can help to find the truth.E. Mathematicians have a great degree of expertise in analyzing art.（分数：1.00）A.B.C.D.E.11.s1（分数：1.00）A.B.C.D.12.The water level in a tank is lowered by 6 inches, then raised by inches, and then lowered by 4 inch

33、es. If the water level was x inches before the changes in level, which of the following represents the water level, in inches, after the changes?（分数：1.00）A.B.C.D.E.二、SECTION 2(总题数：10，分数：20.00)Total enrollment in higher education institutions, by controland type of institution: Fall 1972-95（分数：2.00）(

34、1).In 1995 the number of students enrolled in public institutions of higher education was approximately how many times the number of students enrolled in private institutions of higher education?A. 2B. 2.5C. 3D. 3.5E. 4（分数：1.00）A.B.C.D.E.(2).If the total enrollment in institutions of higher educatio

35、n in 1972 was 5,000,000. approximately how many students were enrolled in private 4-year institutions in 1995?A. 1,000,000 B. 1,100,000 C. 1,250,000D. 1,500,000 E. 1,650,000（分数：1.00）A.B.C.D.E.（分数：2.00）(1).In which of the following pairs of years were the ratios of Republican receipts to Democratic r

36、eceipts most nearly equal?A. 1981-82 and 1985-86B. 1983-84 and 1995-96C. 1987-88 and 1989-90D. 1987-88 and 1995-96E. 1991-92 and 1993-94（分数：1.00）A.B.C.D.E.(2).Between which two consecutive two-year periods was there the greatest percent increase in the Democratic receipts?A. 1981-82 to 1983-84B. 198

37、5-86 to 1987-88C. 1989-90 to 1991-92D. 1991-92 to 1993-94E. 1993-94 to 1995-96（分数：1.00）A.B.C.D.E.The Earthquake Country Alliance (ECA) recently released its guidelines for protective action in case of an earthquake. Operating under the slogan, “Drop, Cover, and Hold on,“ the ECA urges individuals ex

38、periencing an earthquake to drop to the ground, seek the cover of a sturdy table, and hold on. The ECAs most important message is stay put. Individuals should not try to leave the room, even if better cover could be found elsewhere. The secondary message includes what not to do. Persons caught in an

39、 earthquake are now told not to seek shelter in doorways. Structurally, doorways are no safer than the rest of the building, and they provide no protection from falling debris. Similarly, individuals should avoid the so-called “triangle of life“ on the side of furniture or automobiles.（分数：2.00）(1).B

40、ased on the passage, the author would most likely disagree with which of the following statements?A. Seeking out the “triangle of life“ is an ineffective protective measure in the event of an earthquake.B. In the event of an earthquake, individuals should always seek shelter in the dining room under

41、 the table.C. In the past, people were told to seek shelter from earthquakes by standing in doorways.（分数：1.00）A.B.C.(2).Select the sentence that summarizes the current safety message from the Earthquake Country Alliance.（分数：1.00）填空项 1:_As concerns over mans impact on the global environment increase,

42、 many interesting innovations are being considered. For example, “green roofs“ - plant-filled roof top gardens - are one substantial way to confront the countrys ecological problems, and there seems to be very little in the way of a downside. For one thing, a green roof acts as a sponge for rainwate

43、r, absorbing the majority of water from a typical rainstorm. Only three to five inches of soil for a green roof is sufficient for this to occur, which keeps the weight of the roof to a minimum. Because the plantings on the roof absorb the rainwater, drainage and sewage systems have a decreased volum

44、e of water pumping through them, keeping these systems from becoming over-stressed. And while, the soil and plants are absorbing rainwater, they are also taking in pollutants for their own nourishment by storing carbon and then emitting necessary oxygen back into the atmosphere.（分数：3.00）(1).The seco

45、nd and third sentences are characterized, respectively, byA. warning and justificationB. generalization and specificationC. invocation and definitionD. authority and reverenceE. confession and resolution（分数：1.00）A.B.C.D.E.(2).The authors main point in the passage is thatA. green roofs are expensive

46、to install and maintainB. green roofs are both innovative and eco-friendlyC. global warming concerns have led to many new inventionsD. plant-filled roof gardens emit oxygen into the atmosphereE. green roofs are the definitive cure for global warming（分数：1.00）A.B.C.D.E.(3).The author references the ab

47、sorption capabilities of green roofs primarily in order to illustrateA. a preoccupation with style over design practicalityB. the inefficiencies of installing plantings to a buildings roofC. how green roofs lead to more efficient and less-stressed home systemsD. the increased public interest in envi

48、ronmental friendliness in the construction industryE. how global warming has accelerated societys interest in environmentally friendly structures（分数：1.00）A.B.C.D.E.Questions : See the graphs on the fol.-lowing page for information to answer the questions.Adult education participation rates in the pa

49、st 12 months: 1991 and 1995（分数：3.00）(1).Each of the following is a valid conclusion from the graphs and the fact that the population of the United States was greater in 1995 than in 1991 EXCEPTA. In 1991, adults whose highest degree was at least a bachelors degree were more than twice as likely to participate in adult educa-tion than those whose highest educational attainment was a high school diploma or GED (high school equivalency diplomaB. On a percentage basis, from 1991 to 1995, the greatest increase in