GRE-94及答案解析.doc

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1、GRE-94及答案解析(总分：41.00，做题时间：90 分钟)一、SECTION 1(总题数：16，分数：20.00)（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 of XYZ common stock was approximately what percent of the price of XYZ common

2、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 approximately what percent of the price of XYZ stock?A. 25 B. 60 C. 70D. 140 E. 170（分数：1.0

3、0）A.B.C.D.E.1.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.

4、00）A.B.C.D.E.2.In a normal distribution, 68% of the scores lie within one standard 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 5

5、00, approximately how many students scored above 600?A. 2,400 B. 4,800 C. 5.100D. 7,200 E. 9,600（分数：1.00）A.B.C.D.E.（分数：2.00）(1).In which season did Jagr earn the most money per game?A. 1994-1995 B. 1995-1996C. 1996-1997 D. 1997-1998E. 1998-1999（分数：1.00）A.B.C.D.E.(2).In which season did Jagr average

6、the most points per game?A. 1990-1991 B. 1995-1996C. 1996-1997 D. 1997-1998E. 1998-1999（分数：1.00）A.B.C.D.E.3.In a group of 100 students, more students are on the fencing team than are 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 minimu

7、m 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.4.In many Western 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 ot

8、her, more flexible systems. The European construction of law provides litigants with a clear picture of how a case will be decided. 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 o

9、ne situation to another, allows for court systems in Western Europe to process cases efficiently and cuts down on the amount of frivolous 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 concer

10、ned withA. arguing for a universal application of Western European legal practicesB. decrying the rigidity and constancy of Western European legal practicesC. describing the potential benefits of Western European legal systemsD. defining the pros and cons of various legal systemsE. denouncing Europe

11、an law for its anti-consumer bias（分数：1.00）A.B.C.D.E.5.Dan drove home from college at an average rate of 60 miles per hour. On his trip back to college, his rate was 10 miles per hour slower and the trip took him one hour longer than the drive home. How far is Dans home from the college?A. 65 miles B

12、. 100 milesC. 200 miles D. 280 milesE. 300 miles（分数：1.00）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.How many students are either juniors or males o

13、r both?A. 678 B. 766 C. 948D. 1,130 E. 1,312（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 from the Greek words syn, which means “together,“ and aisthesis, which means “percept

14、ion 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 the causes of synesthesia, nor do they fully understand the mechanisms of the diso

15、rder. 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 system, which leads to a juxtaposition of two, typically unrelated senses. Synesthe

16、tic 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 mentioned previously. Researchers estimate that there could be as many as 35 differen

17、t 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 sensation, for example. Although the perceptions vary among individuals, accordin

18、g 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 of the passage is toA. describe a medical condition that might be difficult to rec

19、ognize 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. reject one explanation of a complex phenomenon in favor of anotherE. admit severa

20、l 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 passage, each of the following statements regarding synesthesia is true EXCEPTA. resear

21、chers 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 permutations of synesthesia suggest that individuals experience shifting inter-se

22、nsory 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.8.In a group of 80 students, 24 are enrolled in geometry, 40 in biology, and 20 in both. If a student were randomly selected from the 80 students, what is t

23、he probability that the student selected would not be enrolled in either course?A. 0.20 B. 0.25 C. 0.45D. 0.55 E. 0.60（分数：1.00）A.B.C.D.E.9.In the world of art, distinguishing the authentic piece from the forgery is not an easy feat and often requires the use of multiple experts. Millions of dollars

24、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 analyze digital images of authenticated paintings where they found

25、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 following?A. It is nearly impossible to determine whether a painting

26、 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 truth.D. Art can be difficult to analyze, but mathematical models can

27、 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.10.Josh works on the second floor of a building. There are 10 doors to the building and 8 staircases from the first to the second floor. Josh decided that each day he would enter by one doo

28、r 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 E. 6400（分数：1.00）A.B.C.D.E.11.What is the average of four consecutive odd numbers starting with 2n+1?A. 4 B. 2n+

29、3 C. 2n+4D. 2n+5 E. n+4（分数：1.00）A.B.C.D.E.12.Researchers at the Shimizu Institute in Japan believe it is possible to terraform Mars by making use of the planets own resources and by introducing genetically altered life from Earth. They hope these actions will speed up the terraforming process, not j

30、ust by adapting Mars to support Earth-life, but also by adapting Earthlife to exist on Mars. These experts think they can use the Martian geology itself to jump-start the planet. The theory is that detonation of thermonuclear devices deep in the Martian mountains will trigger eruptions of hot magma

31、that would melt the frozen atmosphere, thereby releasing the components necessary for life.Which of the following, if true, would most weaken the experts theory as explained in the last two sentences?A. Martian mountains are well-situated and easily accessible by remote mobility devices.B. Similar e

32、ruptions of magma on Earth have demonstrated the ability to enable life in hostile underwater environments.C. Mars frozen atmosphere lacks the critical components necessary for life.D. Even if scientists could terraform Mars, the planet would eventually have all the same problems as Earth.E. Thermon

33、uclear devices would be very dangerous to send to Mars.（分数：1.00）A.B.C.D.E.13.The average (arithmetic mean) number of trees per acre in a 40-acre plot is 140. If a 10-acre section of the plot contains 90 trees per acre, how many trees are there in the remaining 30 acres?A. 5,700 B. 4,700 C. 4,200D. 3

34、,600 E. 2,700（分数：1.00）A.B.C.D.E.二、SECTION 2(总题数：14，分数：21.00)As concerns over mans impact on the global environment increase, many interesting innovations are being considered. For example, “green roofs“ - plant-filled roof top gardens - are one substantial way to confront the countrys ecological pro

35、blems, and there seems to be very little in the way of a downside. For one thing, a green roof acts as a sponge for rainwater, 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 r

36、oof to a minimum. Because the plantings on the roof absorb the rainwater, drainage and sewage systems have a decreased volume 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 f

37、or their own nourishment by storing carbon and then emitting necessary oxygen back into the atmosphere.（分数：3.00）(1).The second and third sentences are characterized, respectively, byA. warning and justificationB. generalization and specificationC. invocation and definitionD. authority and reverenceE

38、. 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 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 int

39、o 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 absorption capabilities of green roofs primarily in order to illustrateA. a preoccupation with style over design practicalityB. the inefficiencies of installing plantings to a bu

40、ildings roofC. how green roofs lead to more efficient and less-stressed home systemsD. the increased public interest in environmental 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.14.If A is t

41、he point (-4, 1) and B is the point (2, 1), what is the area of the circle which has AB as a diameter?A. 3B. 6C. 9D. 12E. 36（分数：1.00）A.B.C.D.E.15.In 1980, the cost ofp pounds of potatoes was d dollars. In 1990, the cost of 2p pounds of potatoes was （分数：1.00）A.B.C.D.E.Scientists believe that by raisi

42、ng atmospheric pressure and surface temperature, it is possible to transform the climate of Mars to the point where humans would be able to live there. The process by which a hostile or unsuitable environment is transformed into one that can sustain human life is called terraforming. In addition to

43、potentially providing an alternate home for the people of Earth in the future, this undertaking may also allow scientists to test hypotheses about the process of global warming, which is a highly pertinent issue affecting our planet today.（分数：2.00）(1).Which of the following can be inferred from the

44、passage regarding the Martian atmosphere?A. It has a lower pressure than Earths atmosphere.B. It has a higher surface temperature than Earth.C. It can most certainly be transformed to be more like Earths atmosphere.（分数：1.00）A.B.C.(2).The passage addresses which of the following consequences of terra

45、forming?A. The creation of a more hospitable planet.B. The risk of overpopulation.C. The elimination of suitable environments.D. The depletion of the atmosphere.E. The production of greenhouse gases.（分数：1.00）A.B.C.D.E.16.For any numbers a, b, and c,For which of the following equations is it true tha

46、t there is exactly one positive integer that satisfies it?（分数：1.00）A.B.C.D.E.17.Thousands of years ago, royalty of diverse cultures were often buried in extremely lavish tombs that they themselves commissioned in preparation for their inevitable deaths. About 2,200 years ago, a Chinese emperor named

47、 Qin Shihuang had such a tomb prepared. At the age of thirteen, Qin Shihuang had succeeded his father as emperor. The boy was very aggressive and ambitious. He assumed full power at the age of 22 by ridding himself of his rival, a man who had controlled the throne while Qin Shihuang was a minor. Qin

48、 Shihuangs goal was to unify and subjugate all of the Chinese states using his powerful political, economic, and military strength. Despite an ongoing quest for immortality, Qin Shihuang died while traveling at the age of 49. Although he has been dead for centuries, historians can continue to learn

49、of his life by studying the artifacts found in the extravagant tomb in which he was laid to rest.According to the passage, Qin Shihuang can best be described asA. benevolentB. modestC. spontaneousD. insightfulE. ruthless（分数：1.00）A.B.C.D.E.Directions: In the following questions, choose the best answer from the five choices listed.（分数：3.00）(1).The Center City Little League is divided into d divisions. Each division has t teams, and each team has p players. How many players are there in the entire league?（分数：1.00）A.B.C.D.E.(2).A number x is chosen at rand