美国研究生入学考试题库（GRE）真题三及答案解析.doc

1、美国研究生入学考试题库（GRE）真题三及答案解析(总分：156.00，做题时间：150 分钟)一、SECTION 1(总题数：8，分数：25.00)There are five questions below，Five participants at an international conference are plan-ning to take a car trip together. Two persons the driver and one passenger will sit in the front seat of the car, and three persons will

2、sit in the back seat. The names of the five participants and all of the languages that each of them speaks are as follows:Mohsen: Farsi and HebrewOrlando: Italian and RussianShelly: Hebrew and RussianTheo: German and ItalianUrsula: Farsi, German, and HebrewThe participants must be seated in the car

3、according to the following restrictions: The driver must be Orlando or else Shelly. Two persons can be seated side by side only if at least one of the languages they speak is the same.（分数：5）(1).Which of the following is an acceptable seating arrangement, with the driver listed first under “Front Sea

4、t” and the passengers in the back seat listed from one side to the other side?Front Seat Back SeatA Mohsen, Ursula Theo, Orlando, ShellyB Orlando, Mohsen Shelly, Theo, UrsulaC Orlando, Shelly Mohsen, Ursula, TheoD Shelly, Mohsen Ursula, Orlando, TheoE Shelly, Orlando Theo, Mohsen, Ursula（分数：1）A.B.C.

5、D.E.(2).If Mohsen sits in the front seat, which of the following can be true?（分数：1）A.Orlando will be the driver.B.Orlando will sit next to Ursula.C.Shelly will sit in the middle position in the backD.Shelly will be the driver.E.Ursula will sit in the middle position in the back(3).If Theo sits in th

6、e front seat, which of the following must be true?（分数：1）A.Mohsen and Shelly will sit side by side.B.Mohsen and Ursula will sit side by side.C.Orlando and Theo will sit side by side.D.Orlando and Ursula will sit side by side.E.Shelly and Ursula will sit side by side.(4).If both persons sitting in the

7、 front seat speak Hebrew, then it must be true that（分数：1）A.exactly one person sitting in the back seat speaks RussianB.neither speaker of Farsi is sitting in the front seatC.no one sitting in the front seat speaks RussianD.no one sitting in the back seat speaks HebrewE.a speaker of Russian is sittin

8、g in the middle position in the back seat(5).Which of the following must be true if Orlando is the driver?（分数：1）A.If Shelly sits in the front seat, Ursula will sit in the middle position in the back seatB.If Shelly sits in the back seat, she will sit next to UrsulaC.If Theo sits in the front seat, U

9、rsula will sit in the middle position in the back seat.D.If Theo sits in the back seat, he will sit between Mohsen and Ursula.E.If Ursula sits in the back seat, she will sit in the middle position in the back seat.seat.There are two questions below，（分数：2）(1).Which of the following, if true about ear

10、ly 1990, would most help to explain the decrease, in 1990, of the percent of people commuting to jobs in downtown Allentia who do so via public transportation?（分数：1）A.The termination of a governmental subsidy to the public transportation system that serves both the city and its suburbs caused a sub-

11、 stantial increase in fares.B.Many new trains and buses were put into service in the public transportation system both within the city and between the city and its suburbsC.Security was improved in the passenger waiting areas and on the public trains and buses used within the city as well as on thos

12、e used between the city and its suburbs.D.Legislation was passed that increased the fre- quency of public transportation service within the city as well as between the city and its suburbs.E.The number of points served by the public trans- portation system both within the city and between the city a

13、nd its suburbs was increased substantially by adding new routes.(2).Which of the following, if true about early 1992, could most contribute to an explanation of the change, between 1991 and 1992, in the percent of those who commute via public transportation from the outer suburbs of Allentia, as com

14、pared to the change for the other group of commuters?（分数：1）A.The price per gallon for gasoline declined by five percent.B.The cost of using public transportation, per mile traveled, increased.C.The number of people who commuted to work via public transportation from points in or near downtown Allent

15、ia increasedD.The frequency of public transportation service between the city and its suburbs decreased.E.The cost per mile of getting to and from work by car tripled.1.A new and more aggressive form of the fungus that caused the Irish potato famine of the nineteenth century has recently arisen. How

16、ever, since this new form of the fungus can be killed by increased application of currently used fungicides, it is unlikely that the fungus will cause widespread food shortages in countries that currently rely on potatoes for sustenance.Which of the following, if true, most calls into question the c

17、on- clusion in the argument above?（分数：1.00）A.Though potatoes are an important staple crop in many parts of the world, people in most countries rely primarily on wheat or rice for sustenanceB.Potato farmers in many countries to which the new form of the fungus has spread cannot afford to increase the

18、ir spending on fungicidesC.The new form of the fungus first began to spread when contaminated potato seeds were inadvertently exported from a major potato-exporting country.D.Potato farmers in most countries use several insecticides on their crops in addition to fungicides of the sort that kill the

19、new form of the fungus.E.Most governments have funds set aside that can be used to alleviate the effects of large-scale disasters such as severe food shortages and floodsThere are eight questions below，The organizers of a music festival are scheduling exactly six master classes, one class per day fo

20、r six consecutive days. Three of the classes will be given by violinists and three by pianists. The only musicians who can teach the classes are the violinists F, G, H, and J, and the pianists R, S, T, W, and Z. The festivals organizers must observe the following constraints:No musician will teach m

21、ore than one class. F will not teach unless the first three classes are taught by violinists. If J teaches a class, it will be the sixth. R will teach only if T teaches the first class. No pianist will teach on a day that immediately pre- cedes or immediately follows a day on which W teaches（分数：8）(1

22、).Which of the following can be the musicians scheduled to teach the master classes, in the order in which they will teach, from first to sixth?（分数：1）A.F, J, G, T, Z, SB.F, W, H, T, G, ZC.G, F, H, T, S, ZD.S, G, W, H, R, JE.T, G, W, H, R, S(2).If R is scheduled to teach the second class, which of th

23、e following could be scheduled to teach the third class?（分数：1）A.FB.GC.JD.TE.W(3).Which of the following must be true about the schedule of master classes?（分数：1）A.J is not scheduled to teach if R is scheduled to teach.B.J is not scheduled to teach if T is scheduled to teachC.J is not scheduled to tea

24、ch if W is scheduled to teach.D.W is not scheduled to teach if F is scheduled to teachE.Z is not scheduled to teach if W is scheduled to teach.(4).If pianists are scheduled to teach the fourth, fifth, and sixth classes, which of the following must be true?（分数：1）A.F is scheduled to teach the first cl

25、assB.G is scheduled to teach the first classC.H is scheduled to teach an earlier class than the class Z is scheduled to teach.D.R is scheduled to teach an earlier class than the class T is scheduled to teach.E.S is scheduled to teach an earlier class than the class T is scheduled to teach.(5).Which

26、of the following must be true about the schedule of the master classes?（分数：1）A.If F is scheduled to teach a class, then H is also scheduled to teach a classB.If J is scheduled to teach a class, then R is also scheduled to teach a class.C.If J is scheduled to teach a class, then S is also scheduled t

27、o teach a classD.If T is scheduled to teach a class, then R is also scheduled to teach a class.E.If W is scheduled to teach a class, then Z is also scheduled to teach a class.(6).If classes are scheduled so that the classes taught by pianists and the classes taught by violinists alternate with one a

28、nother, which of the following can be true?（分数：1）A.F is scheduled to teach the fourth classB.G is scheduled to teach the first class.C.H is scheduled to teach the third class.D.R is scheduled to teach the fifth class.E.W is scheduled to teach the second class.(7).If a violinist is scheduled to teach

29、 the first class and another violinist is scheduled to teach the sixth class, which of the following can be true?（分数：1）A.F is scheduled to teach the second class.B.H is scheduled to teach the sixth class.C.R is scheduled to teach the fourth classD.T is scheduled to teach the second class.E.W is sche

30、duled to teach the third class.(8).Which of the following CANNOT be true about the schedule of the master classes?（分数：1）A.F is scheduled to teach the third class.B.G is scheduled to teach the first class.C.T is scheduled to teach the sixth class.D.W is scheduled to teach the sixth class.E.Z is sched

31、uled to teach the fifth class.There are five questions below，In a small office suite, six offices are arranged in a straight line, one after another, and are consecutively num- bered 1 through 6. Exactly six people P, Q, R, S, T and U are to be assigned to these six offices, exactly one person to an

32、 office, according to the following conditions:P must be assigned to an office immediately adjacent to the office to which T is assigned.Q cannot be assigned to an office immediately adja- cent to the office to which S is assigned.R must be assigned either to office 1 or to office 6.S must be assign

33、ed to a lower-numbered office than the office to which U is assigned.（分数：6）(1).Which of the following can be the list of the six people in the order of their offices, from office 1 through office 6?（分数：1）A.Q, U, S, T, P, RB.R, P, T, S, U, QC.R, S, Q, U, P, TD.S, T, Q, P, U, RE.T, P, S, R, Q, U(2).If

34、 T is assigned to office 6. then U must be assigned to office（分数：1）A.1B.2C.3D.4E.5(3).If Q is assigned to office 2, then the person assigned to office 6 must be（分数：1）A.PB.RC.SD.TE.U(4).If Q is assigned to office 1, which of the following CANNOT be true?（分数：1）A.P is assigned to office 3.B.P is assign

35、ed to office 4.C.S is assigned to office 4.D.T is assigned to office 2.E.T is assigned to office 3.(5).If U is assigned to office 3, then Q must be assigned to office（分数：1）A.1 or 2B.1 or 6C.2 or 5D.4 or 5E.4 or 6(6).If S is assigned to office 2, which of the following can be true?（分数：1）A.P is assign

36、ed to office 1.B.Q is assigned to office 3.C.R is assigned to office 6.D.T is assigned to office 5.E.U is assigned to office 4.2.As government agencies, faced with budget difficulties, reduce their funding for scientific research, a greater amount of such research is being funded by private foundati

37、ons. This shift means that research projects likely to produce controversial results will almost certainly comprise a smaller proportion of all funded research projects, since private foundations, concerned about their public image, tend to avoid controversy.Which of the following is an assumption o

38、n which the argument depends?（分数：1.00）A.Only research that is conducted without concern for the possibility of generating controversy is likely to produce scientifically valid results.B.Private foundations that fund scientific research projects usually recognize that controversial results from those

39、 projects cannot always be avoided.C.Scientists who conduct research projects funded by private foundations are unlikely to allow the concerns of the funding organizations to influence the manner in which they conduct the research.D.Many government agencies are more concerned about their public imag

40、e than are most private foundations.E.Government agencies are more willing than are private foundations to fund research projects that are likely to produce controversial results3.Juries in criminal trials do not base verdicts on uncorroborated testimony given by any one witness. Rightly so, because

41、 it is usually prudent to be highly skeptical of unsubstantiated claims made by any one person. But then, to be consistent, juries should end an alltoo-common practice: convicting defendants on the basis of an uncorroborated full confession.Which of the following, if true, most strengthens the argum

42、ent above?（分数：1.00）A.Juries often acquit in cases in which a defendant retracts a full confession made before trialB.The process of jury selection is designed to screen out people who have a firm opinion about the defendants guilt in advance of the trialC.Defendants sometimes make full confessions w

43、hen they did in fact do what they are accused of doing and have come to believe that the prose- cutor has compelling proof of this.D.Highly suggestible people who are accused of wrongdoing sometimes become so unsure of their own recollection of the past that they can come to accept the accusations m

44、ade against them.E.Many people believe that juries should not con- vict defendants who have not made a full confession.4.Although spinach is rich in calcium, it also contains large amounts of oxalic acid, a substance that greatly impedes calcium absorption by the body. Therefore, other calcium-conta

45、ining foods must be eaten either instead of or in addition to spinach if a person is to be sure of getting enough calcium.Which of the following, if true, most seriously weakens the argu-ment above?（分数：1.00）A.Rice, which does not contain calcium, counteracts the effects of oxalic acid on calcium abs

46、orption.B.Dairy products, which contain even more calcium than spinach does, are often eaten by people who eat spinach on a regularbasis.C.Neither the calcium nor the oxalic acid in spinach is destroyed when spinach is cooked.D.Many leafy green vegetables other than spinach that are rich in calcium

47、also contain high concentrations of oxalic acid.E.Oxalic acid has little effect on the bodys ability to absorb nutrients other than calcium.二、SECTION 2(总题数：12，分数：15.00)5.Of the following, which is the closest approximation to （分数：1.00）A.400B.120C.100D.40E.106.If (x - 1) 2 = (x - 2) 2 , then x=（分数：1.

48、00）A.-5/8B.2/3C.4/3D.2/3E.5/27.In the figure above, the areas of square regions X and Y are 1 and 4, respectively. What is the area of the triangular region?（分数：1.00）A.2B.1C.3/4D.1/2E.1/48.If erasers cost $0.25 each, at most how many erasers can be purchased for n dollars, where n is an integer?（分数：

49、1.00）A.n/25B.n/4C.4nD.25nE.25n/49.Three salespeople are paid commissions in proportion to the amount of their sales, which total $25, 000, $40, 000, and $60, 000, respectively. If a total of $20, 000 is allocated for these three commissions, what is the amount of the largest commission paid?（分数：1.00）A.$8, 000B.$8, 400C.$9, 600D.$10, 000E.$12, 000There are three questions below，For a cash advance, a certain credit card company charges a transaction fee equal to a percent of the total amount of the cash advance, according to the graph below.（分数：3）(1).When compared with the transaction fee