GRE-87及答案解析.doc

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1、GRE-87及答案解析(总分：43.00，做题时间：90 分钟)一、SECTION 1(总题数：19，分数：22.00)1. （分数：1.00）A.B.C.D.E.2.All three circles shown have radius 1 and are tangent to each other. Find the perimeter of the shaded region.A. 3 B. C. （分数：1.00）A.B.C.D.E.3.Josh works on the second floor of a building. There are 10 doors to the bui

2、lding and 8 staircases from the first to the second floor. Josh decided that each day he would enter by one door and leave by a different one, and go up one staircase and down another. How many days could Josh do this before he had to repeat a path he had previously taken?A. 80 B. 640 C. 800D. 5040

3、E. 6400（分数：1.00）A.B.C.D.E.（分数：3.00）(1).For which country was the ratio of its savings rate to its real GNP growth rate greatest?A. Japan B. Canada C. AustraliaD. Italy E. Switzerland（分数：1.00）A.B.C.D.E.(2).For how many of the countries shown was the savings rate more than 5 times the real GNP growth

4、rate?A. Five B. Four C. ThreeD. Two E. One（分数：1.00）A.B.C.D.E.(3).Which of the following statement can be inferred from the graph? On the average, people in the United States saved about the same amount as people in the United Kingdom. The median of the savings rates for the eight countries was great

5、er than 11 percent. Only two of the countries had a higher savings rate than Italy.A. only B. only C. onlyD. and E. and （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 price of XYZ common stock was at its greatest, the price

6、 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 was the greatest, the price of ABC stock was approximate

7、ly 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.4.A certain five-member committee must be assembled from a pool of five women - A. B, C, D and E, and three men- X, Y, and Z, what is the probability that the committee will incIude B, C, E, Y and Z?（分数：1.00）A

8、.B.C.D.E.5.When 9 students took a zoology quiz with a possible score of 0 to 10 inclusive, their average (arithmetic mean) score was 7.5. If a tenth student takes the same quiz, what will be the least possible average score on the quiz for all 10 students?A. 6.5 B. 6.75 C. 7.0D. 7.25 E. 7.5（分数：1.00）

9、A.B.C.D.E.6.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.7.The water level in a tank is lowered by 6 inches, then raised by inches, and then lowered by 4 inches. I

10、f 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.8.Because her test turned out to be more difficult than she intended it to be, a teacher decided to adjust the grades by deducting only half

11、the number of points a student missed. For example, if a student missed 10 points, she received a 95 instead of a 90. Before the grades were adjusted the class average was A. What was the average after the adjustment?（分数：1.00）A.B.C.D.E.9.The advertised rate for roaming charges is 0. 002 cents per se

12、cond. What is that in dollars per hour?A. 7.2 B. 2 C. 0.72D. 0.2 E. 0.072（分数：1.00）A.B.C.D.E.10.A developer has land that has x feet of lake frontage. The land is to be subdivided into lots, each of which is to have either 80 feet or 100 feet of lake frontage. If （分数：1.00）A.B.C.D.E.11.In many Western

13、 European nations, the law is seen as rigid and not open to interpretation. This rigidity grants a consistency to questions of law that many would argue is absent in other, more flexible systems. The European construction of law provides litigants with a clear picture of how a case will be decided.

14、All parties involved are certain how judges will rule on issues. It is simple-judges will strictly follow the law. This simple fact, that the law will not change from one situation to another, allows for court systems in Western Europe to process cases efficiently and cuts down on the amount of friv

15、olous lawsuits. It is useless for an individual to attempt a case if he knows in advance that the law is not in his favor.In the passage, the author is primarily concerned withA. arguing for a universal application of Western European legal practicesB. decrying the rigidity and constancy of Western

16、European legal practicesC. describing the potential benefits of Western European legal systemsD. defining the pros and cons of various legal systemsE. denouncing European law for its anti-consumer bias（分数：1.00）A.B.C.D.E.12.In the world of art, distinguishing the authentic piece from the forgery is n

17、ot an easy feat and 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 expe

18、rts were able to analyze 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 sugges

19、ts which of the following?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 gre

20、ater degree of truth.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.13.The water level in a tank is lowered by 6 inches, then raised by inches, and then lowered by 4 inches.

21、 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.14.George earned 80, 85 and 90 on the first three tests in his geography class. Because he didnt have time to study, he decides to guess ra

22、ndomly 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.15.If the radius of a circular region were decreased by 20 percent, the area of the circular region would decrease by what percent?A. 1

23、6% B. 20% C. 36%D. 40% E. 44%（分数：1.00）A.B.C.D.E.16.If the circumference of the 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.17.Eli Whitneys cotton gin famously changed the face of the agricultural industry by greatly incr

24、easing productivity. Although the gin was enormously popular, Whitney himself struggled to make a profit from it. After receiving a patent for his invention, Whitney and his business partner opted to produce as many cotton gins as possible and to charge farmers a user fee instead of selling them out

25、right. Farmers considered this fee unnecessary and exorbitant, and began manufacturing copies of the cotton gin instead. Because of a loophole in the patent law, the many lawsuits brought by Whitney and his partner against the farmers were fruitless. The duo finally agreed to license their cotton gi

26、ns at a reasonable price. However, due to the costs of their legal battles, they were unable to make the fortune that Whitney had previously predicted.According to the passage, which one of the following was an obstacle in implementing widespread use of Whitneys cotton gin?A. Whitneys reluctance to

27、seek a patent for his cotton ginB. The high fees being charged to farmers for the use of Whitneys cotton ginC. The negative impact of Whitneys cotton gin on the economy of the southD. Whitneys inability to profit from his inventionE. Whitneys reliance on a loophole in the patent law（分数：1.00）A.B.C.D.

28、E.二、SECTION 2(总题数：13，分数：21.00)We packed early. An 8 a.m. international flight, especially one to be taken with children, demands strict attention to detail and advance preparation. But with that chore finished, it was time to spend one last afternoon in Paris. We chose to see the Louvre. We planned

29、our visit strategically: the Mona Lisa, of course, followed by the Venus De Milo. The Napoleon buff in our party insisted on seeing the Jacques Louis Davids seemingly life-sized painting of the emperors coronation, while the children were thrilled by the Egyptian mummies. I think we walked for miles

30、.Despite the frenetic pace, we saw only a fraction of the museum before it was time to head home-home being a tiny, sixth-floor apartment in the 10th arrondissement. Sitting amongst our suitcases, we flipped through our souvenirs and swapped stories with our host until bedtime. Lifting a glass towar

31、d our window view of a sparkling Eiffel Tower, we toasted each other-and a beautiful day in Paris.（分数：2.00）(1).Which of the following is implied about the visit to the Louvre?A. The Louvre is the largest, most comprehensive art museum in the world.B. The visit was exhausting and inappropriate for sm

32、all children.C. The visit encompassed diverse tastes.（分数：1.00）A.B.C.(2).In the passage, the author is primarily concerned withA. emphasizing the immense diversity of art to be found at the Louvre museumB. describing the challenges of international travel with childrenC. complaining about inadequate

33、accommodations in EuropeD. giving an account of her last day in ParisE. bragging about her foreign vacation（分数：1.00）A.B.C.D.E.Since 1875, when Alexander Graham Bell first discovered how to send the human voice along wires, the telephone has been one of the worlds most utilized and essential methods

34、of communication. The first telephone exchange in America was established in 1878 and served a total of 21 people. At that time, operators would answer a call and connect two parties by completing an electrical circuit. Little could those operators envision that, one century later, calls would be tr

35、ansmitted along optical fibers and, soon after, would become totally wireless and portable. The idea of orbiting satellites picking up millions of calls and relaying them across the planet would have been unimaginable.（分数：2.00）(1).It can be inferred from the passage thatA. satellites transmit teleph

36、one callsB. early telephone users were frustrated by the technologys inefficienciesC. wireless telephones are preferable to land-based lines（分数：1.00）A.B.C.(2).Select the sentence that establishes the scope of the earliest telephone communications.（分数：1.00）填空项 1:_18.Directions: The next questions are

37、 based on the content of the following passage. Read the passage and then determine the best answer choice for each question. Base your choice on what this passage states directlyor implies, not on any information you may have gained elsewhere.For each of Questions 17-20, select one answer choice un

38、less otherwise instructed.Questions 17-19 are based on the following passage.As the works of dozens of women writers have been rescued from what E. P. Thompson calls “the enormous condescen- Line sion of posterity,“ and considered in relation(5) to each other, the lost continent of thefemale traditi

39、on has risen like Atlantis fromthe sea of English literature. It is nowbecoming clear that, contrary to Mills the-ory, women have had a literature of their(10) own all along. The woman novelist, accord-ing to Vineta Colby, was “really neither sin-gle nor anomalous,“ but she was also morethan a “regi

40、ster and spokesman for her age.“She was part of a tradition that had its ori-(15) gins before her age, and has carried onthrough our own.Many literary historians have begun toreinterpret and revise the study of womenwriters. Ellen Moers sees womens literature(20) as an international movement, “apart

41、 from,but hardly subordinate to the mainstream:an undercurrent, rapid and powerful. Thismovement began in the late eighteenth cen-tury, was multinational, and produced some(25) of the greatest literary works of two centuries,as well as most of the lucrative pot-boilers.“Patricia Meyer Spacks, in The

42、 FemaleImagination, finds that “for readily discerniblehistorical reasons women have characteristi-(30) cally concerned themselves with matters moreor less peripheral to male concerns, or at leastslightly skewed from them. The differencesbetween traditional female preoccupationsand roles and male on

43、es make a difference in(35) female writing.“ Many other critics are begin-ning to agree that when we look at womenwriters collectively we can see an imaginativecontinuum, the recurrence of certain pat-terns, themes, problems, and images fromgeneration to generation.In the second paragraph of the pas

44、sage the authors attitude toward the literary historians cited can best be described as one ofA. ironyB. ambivalenceC. disparagementD. receptivenessE. awe（分数：1.00）A.B.C.D.E.19.Traditional critical scholarship has considered a literary work the product of one focused mind, along with its social influ

45、ences, struggling to achieve self-expression. In such a context, the authors intended meaning, especially as it may be inferred by the circumstances surrounding his life and the work, is extremely important: the authors intention should be taken as the gold standard in determining what constitutes a

46、n accurate and valid reading of the text. A natural outgrowth of measuring the validity of readings by this standard is the rejection of those readings that do not fit what the author intended, or what the surrounding culture expected the author to intend.In the passage, “gold standard“ most nearly

47、meansA. monetary normalcyB. natural outgrowthC. financial customD. cultural expectationE. best practice（分数：1.00）A.B.C.D.E.20.What is the average (arithmetic mean) of 330, 360, and 390?A. 360 B. 3177 C. 310 + 320 + 330D. 327 + 357 + 387 E. 329 + 359 + 389（分数：1.00）A.B.C.D.E.21.Human fascination with s

48、pace began hundreds of years ago. That interest has not waned, and today, the Hubble Telescope orbits 375 miles above Earth, working nonstop to unlock the secrets of the universe. The Hubble uses state-of-the-art instruments to provide amazing views of the universe that cannot be matched by ground-b

49、ased telescopes. The reason for this is that, from the ground, we look at stars and other objects in space through Earths atmosphere. Our atmosphere is full of clouds, dust, and pollution, which cause everything we see to shimmer and shake. This effect creates difficulty for scientists on the ground to make steady, accurate measurements of objects moving in space. With assistance from the Hubble Telescope, astronomers can pinpoint the location of faraway stars and galaxies, and measure the speeds and distances of astronomical objects