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GRE试题6

2006-01-19 00:00

  Time -30 minutes

  25 Questions

  Questions 1-8

  A bakery makes nine kinds of cookies. Of these nine,

  three kinds are fruit cookies-G, H, and J; three kinds

  are nut cookies-K, L, and O; and three kinds are plain

  cookies-X, Y, and Z. Each day of the week, Monday

  through Sunday, the bakery will feature a special price

  on exactly three different kinds of cookies. The three

  featured cookies will be selected according to the

  following rules:

  Each day at least one fruit cookie must be featured,

  and each day at least one nut cookie must be

  featured.

  On any day on which cookie J is featured, cookie L

  cannot be featured.

  On any day on which cookie k is featured, cookie Y

  must also be featured.

  No kind of cookie can be featured more than three

  times in a week.

  1.Which of the following lists three cookies that can be

  featured together?

  (A) G, L, Z

  (B) H, K, X

  (C) J, L, Y

  (D) J, O, Z

  (E) K, O, Y

  2. On a day on which both cookie L and cookie Z are

  featured, which of the following can be the third kind

  of cookie featured?

  (A) H

  (B) J

  (C) O

  (D) X

  (E) Y

  3.A partial schedule of featured cookies is shown below.

  Monday Tuesday Wednesday Thursday Friday

  L H O G Z

  According to this schedule, which of the following is a day on

  which cookie X CANNOT be one of the featured cookies?

  (A) Monday

  (B) Tuesday

  (C) Wednesday

  (D) Thursday

  (E) Friday

  4.If cookie J is featured on Friday, Saturday, and

  Sunday; if cookie K is featured on Monday, Tuesday,

  and Wednesday, and if cookie G is featured only on

  Thursday, then cookie L can be featured on

  (A) Monday only

  (B) Thursday only

  (C) Monday, Tuesday, and Wednesday only

  (D) Friday, Saturday, and Sunday only

  (E) any two of the first four days of the week

  5. If each kind of nut cookie is featured three times in

  one week, what is the maximum number or days on

  which plain cookies can be featured during that week?

  (A) Three

  (B) Four

  (C) Five

  (D) Six

  (E) Seven

  6.If cookie H and cookie Y are each featured on

  Monday, Tuesday, and Wednesday, and if cookie G

  and cookie X are each featured on Thursday, Friday

  and Saturday, then the cookies featured on Sunday

  must include both

  (A) J and K

  (B) J and L

  (C) J and O

  (D) K and L

  (E) K and Z

  7.If exactly seven kinds of cookies are featured during

  one week, which of the following must be true about

  that week?

  (A) X is the only kind of plain cookie that is featured

  (B) Y is the only kind of plain cookie that is featured

  (C) Z is the only kind of plain cookie that is featured.

  (D) On at least one day, both cookie G and cookie Z

  are featured.

  (E) On at least one day, both cookie J and cookie X

  are featured.

  8.If cookie X is featured exactly twice and cookie Z is

  featured exactly three times in one week, which of

  the following must be true?

  (A)Cookie G is featured exactly three times during

  the week.

  (B)Cookie J is featured at most twice during the

  week.

  (C)Cookie K is featured at most twice during the

  week.

  (D)Cookie L is featured at most twice during the

  week.

  (E) Cookie Y is featured exactly twice during the

  week.

  9. In recent years, there has been a dramatic decline in

  the population of the shrike, a predatory bird that

  inhabits flat land, such as farms and pastures. Some

  ornithologists hypothesize that this decline is due to

  the introduction of new, more effective pesticides to

  control the insect species on which shrikes prey.

  The answer to which of the following questions is

  NOT relevant to evaluating the ornithologists'

  hypothesis?

  (A) Was there a decline in the shrike population

  before the new pesticides were first used?

  (B) Have shrike populations declined significantly

  in those habitats where the new pesticides have

  not been used?

  (C) Have the new pesticides more significantly

  reduced the population of insect species on

  which shrikes prey than did the pesticides previously

  used?

  (D) Are insects that have consumed the new pesti-

  cides more toxic to the shrikes that eat those

  insects than were insects that consumed the

  less effective pesticides?

  (E) Are the new pesticides considered by most

  people to be less harmful to the environment

  than the old pesticides were considered to be?

  10. Census data for Prenland show that unmarried

  Prenlandic men in their thirties outnumber unmarried

  Prenlandic women in that age group by about ten to

  One. Most of these men do wish to marry. Clearly,

  however, unless many of them marry women who

  are not Prenlandic, all but a minority will remain

  unmarried.

  The argument makes which of the following assump-

  tions?

  (A) Emigration from Preland is more common

  among women than among men.

  (B) A greater proportion of Prelandic women

  in their thirties than of Prenlandic men of the

  same age would prefer to remain unmarried.

  (C) It is unlikely that many of these unmarried

  Prenlandic men will marry women more than

  a few years older than themselves.

  (D) Prenland has a high rate of divorce.

  (E) Most of the unmarried Prenlandic men are

  unwilling to marry women who are not

  Prenlandic.

  11.Certain extremely harmful bacteria found only in

  sewage are difficult to detect directly. Testing for

  E. coli, an easily detected and less harmful type of

  bacteria, in ocean water would be a reliable way of

  determining whether or not these more harmful bac-

  teria are present, since ocean water contains E. Coli

  only if the water is contaminated with sewage that

  contains the harmful bacteria.

  Which of the following, if true, most seriously

  weakens the argument?

  (A) There are many different strains of the E. coli

  bacteria, and only some of these strains are

  harmful.

  (B) Some types of bacteria found in sewage are

  neither disease-causing nor difficult to detect

  directly.

  (C) Some of the types of bacteria found in sewage

  along with E. coli are not harmful to people

  unless the bacteria are ingested in large quantities.

  (D) E. coli dies out much more quickly than some of

  the more harmful bacteria found in sewage and

  then can no longer be easily detected.

  (E) Some of the types of bacteria found in sewage

  along with E. coli reproduce at a slower rate

  than E. coli.

  Questions 12-17

  A bank has exactly four cashier windows, arranged in a

  row and numbered consecutively 1through 4 from one

  end of the row to the other. The bank has exactly six

  cashiers: two supervisors (Joan and Karim); and four

  trainees (Lorraine, Mark, Nora, and patrick). Throughout

  a particular peak-hour period, the stationing of cashiers at

  windows is restricted as follows:

  There must be exactly one cashier at each window.

  The cashier at window 2 must be a supervisor.

  Lorraine must be at a window but cannot be at window 3.

  If Mark is at one of the windows, Joan must be at a

  window immediately adjacent to it.

  The cashiers at the windows must include either Nora

  or Patrick, but they cannot include both Nora and

  Patrick.

  12.Which of the following lists the cashiers who can be

  stationed at windows 1 through 4 during this period?

  1 2 3 4

  (A) Joan Karim Mark Lorraine

  (B) Joan Karim Nora Lorraine

  (C) Karim Nora Joan Lorraine

  (D) Mark Joan Lorraine Patrick

  (E) Patrick Joan Nora Lorraine

  13.Which of the following must be true about the

  stationing of the cashiers during this period?

  (A) Joan is at window 1 or at window 2.

  (B) Karim is at window 2 or at window 4.

  (C) Lorraine is at window 1 or window 4.

  (D) Nora is at window 1 or at window 3.

  (E) Patrick is at window 3 or at window 4.

  sarily in that order, are stationed at immediately

  adjacent windows, which of the following must be

  stationed at window 4 during this period?

  (A) Joan

  (B) Karim

  (C) Lorraine

  (D) Mark

  (E) Patrick

  15.If during this period Lorraine and Mark, not neces-

  sarily in that order, are stationed at immediately

  adjacent windows, which of the following can be

  stationed at window 1 during this period?

  (A) Joan

  (B) Karim

  (C) Lorraine

  (D) Mark

  (E) Nora

  16.If during this period Lorrained and Nora, not neces-

  sarily in that order, are stationed at immediately

  adjacent windows, which of the following must be

  true during this period?

  (A) Joan is stationed at window 1.

  (B) Joan is stationed at window 2.

  (C) Karim is stationed at window 2

  (D) Nora is stationed at windows 3.

  (E) Patrick is stationed at window 1.

  17.If during this period Mark is stationed at a window,

  which of the following CANNOT be stationed at a

  window during this period?

  (A) Joan

  (B) Karim

  (C) Lorraine

  (D) Nora

  (E) Patrick

  Questions 18-22

  Seven photographs-three landscapes: F, H, and J; and four still lifes:

  Q, R, T and W-will appear on the first seven pages-numbered

  consecutively from page 1 through page 7-of an exhibit catalog.

  Each page will contain exactly one of the photographs. The ordering

  of the photographs in the catalog is governed by the following

  conditions.

  J and W, not necessarily in that order, must appear on consecu-

  tively numbered pages.

  The three landscapes cannot appear on-consecutively numbered

  pages.

  Neither page 2 not page 4 is a page on which a landscape can

  appear.

  A landscape must appear on page 7

  18.Which of the following is an acceptable ordering of the photographs in

  the catalog?

  Page 1 Page 2 page 3 Page 4 page 5 page 6 page 7

  (A) F T H Q W R J

  (B) H Q J W R F T

  (C) J W H R T Q F

  (D) Q T R W J F H

  (E) T F Q W J R H

  19.Any of the following can appear on page 3 EXCEPT

  (A) J

  (B) Q

  (C) R

  (D) T

  (E) W

  20. If F appears on page 6, H must appear on page

  (A) 1

  (B) 2

  (C) 3

  (D) 5

  (E) 7

  21.If the still lifes all appear on consecutive pages,

  which of the following must be true?

  (A) A still life appears on page 1.

  (B) A still life appears on page 5.

  (C) J appears on page 6.

  (D) T appears on page 4.

  (E) W appears on page 5

  22.If F and H, not necessarily in that order, appear on

  consecutive pages, which of the following can be

  true?

  (A) J appears on page 1

  (B) J appears on page 5

  (C) R appears on page 6

  (D) W appears on page 1

  (E) W appears on page 5

  23.The organizers of tomorrow's outdoor concert

  announced that it will go on tomorrow on schedule

  unless bad weather is forecast or too few advance

  tickets are sold. If the concert is canceled, refunds

  will be made to ticket holders. Since some ticket

  holders have already been issued refunds even though

  more than enough advance tickets were sold, it must

  be the case that bad weather is forecast.

  Which of the following is an error of reasoning con-

  tained in the argument?

  (A) It proceeds as if a condition, which by itself is

  enough to guarantee a certain result, is the only

  condition under which that result would occur.

  (B) It bases a conclusion that is known to require

  two conditions on evidence that bears on only

  one of those conditions.

  (C) It explains one event as being caused by another

  event, even though both events must actually

  have been caused by some third, unidentified

  event.

  (D) It treats evidence for the absence of one condi-

  tion under which a circumstance would occur

  as conclusive evidence that that circumstance

  will not occur.

  (E) Evidence given to support the conclusion actually

  undermines it.

  24. Although the prevailing supposition has been that it is

  too hot for microorganisms to survive deep below the

  Earth's surface, some scientists argue that there are

  living communities of microorganisms there that have

  been cut off from surface life for millions of years.

  These scientists base their argument on the discovery

  of living microorganisms in samples of material that

  were taken from holes drilled as deep as 1.74 miles.

  The scientists' argument depends on which of the fol-

  lowing assumptions?

  (A)The microorganisms brought up were of a

  species that is related to those previously

  known to science.

  (B)No holes have been drilled into the Earth's

  surface to a distance deeper than 1.74 miles

  (C)The microorganisms did not come from surface

  soil that came into contact with the drilling

  equipment.

  (D) The stratum from which the samples came has

  been below the surface of the Earth ever since

  the Earth came into existence.

  (E) The temperature at the bottom of the holes drilled

  was not significantly hotter than that of the

  hottest spots on the Earth's surface.

  25. For 20 years all applicants for jobs as technicians at

  EquipCorp were required to demonstrate that they could

  operate and repair the machinery that was central to

  EquipCorp's manufacturing business. Now, however,

  that particular machinery is obsolete, and very different

  machinery fills the central role. Therefore, the old

  requirement is no longer a useful method for evaluating

  whether applicants for jobs as technicians at EquipCorp

  have the skills necessary for the job.

  Which of the following, if true, most strengthens the

  argument?

  (A) The machinery that is now obsolete was used by a

  large number of manufacturing companies before

  it became obsolete.

  (B) Among the people already holding jobs as tech-

  nicians at Equip Corp, those who are most skillful

  at operating the new machinery had been some of

  the least skillful at operating the old machinery

  (C) Most people applying for jobs as technicians today

  have much broader skills than did people applying

  for jobs as technicians 20 years ago.

  (D) The skills required to operate and repair the

  obsolete machinery are useful in operating and

  maintaining many other types of machinery at

  EquipCorp that are not obsolete.

  (E) Much of the machinery that EquipCorp now uses in

  manufacturing is very likely to become obsolete

  within the next 20 years.

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