GRE北美真题系列(十)D

section 2
    Questions 1-4
    Six historians-K, L, M, N, O, and P-are each to present a paper at a one-day conference. Three papers will be presented in the morning session before the lunch break; the other three will be presented in the afternoon session, which follows the lunch break. The scheduling of presentations is subject to the following conditions:
    L's presentation must immediately precede M's presentation; their presentations cannot be separated by the lunch break; N must be either the first or the last in the order of presenters.
    1. If M is to be fifth in the order of presenters, then L must be
    (A) first
    (B) second
    (C) third
    (D) fourth
    (E) sixth
    2. L could be scheduled for any of the following places in the order of presenters EXCEPT
    (A) first
    (B) second
    (C) third
    (D) fourth
    (E) fifth
    3. If P's presentation must immediately follow N's presentation, M could be scheduled for which of the following places in the order of presenters?
    (A) First
    (B) Second
    (C) Third
    (D) Fourth
    (E) Fifth
    4. If P and O are fifth and sixth, respectively, in the order of presenters, which of the following must be true?
    (A) K is first in the order of presenters.
    (B) K is third in the order of presenters.
    (C) K is fourth in the order of presenters.
    (D) L is first in the order of presenters.
    (E) M is fourth in the order of presenters.
    5. Since the recent takeover of publishing concerns by communications-entertainment firms, management new methods have increased the financial profits of commercial publishing, at the price of narrowing the range of books made available to the public and by catering to the vulgar tastes of the new buyers of books. Business has boomed, but the losers are the majority of authors or aspiring writers, and all discriminating readers.
    If the statement above is true, which of the following can also be inferred to be true?
    (A) Profitable business practices are relatively new in the publishing industry.
    (B) Commercial publishing is now catering to a different community of book readers than the book business has served in the past.
    (C) The new profits from methods introduced by communications-entertainment management will encourage writers of literary talent to persevere against the odds.
    (D) The narrowed range of books coming to the public is directed toward a more discriminating audience.
    (E) The public is unaware of the trend in the publishing industry to specialize in books that produce blockbuster sales.
    6. It often happens that some crisis or opportunity induces people to find a practical use for things that originally had no serious purpose. As an example of this principle, consider the dolls and mannequins, programmed to move and built for the delight of the wealthy in the eighteenth century, which were forerunners of the modern computer, likewise, it is almost certain that the first domesticated animals were pets. Domestication of animals seems to have arisen as an amusement long before it had practical application.
    Which of the following, if true provides another example in support of the principle mentioned above?
    (A) The discovery of America was a by product of the search for ginger, cloves, pepper, and cinnamon.
    (B) Children's games often imitate adult work .
    (C) The spyglass was simply a source of diversion until its commercial and scientific potential was recognized, and its power of magnification suitably improved.
    (D) In certain cultures horses are used exclusively for pleasure, and never for work, even though in those culture people are forced to work arduously in the absence of laboring animals.
    (E) The persons who constructed moving dolls and mannequins in the eighteenth century were also clockmakers.
    7. Pharmaceutical firms are now producing analogues (that is, chemical variants) of endorphins, peptides thought to carry messages that, when transmitted among brain cells, result in pain relief. The firms claim that the analogues, when injected into the bloodstream, will provide effective and long-lasting pain relief by augmenting the action of peptides already found in the brain.
    The claim of the pharmaceutical firms would be weakened if it were true that
    (A) endorphins remain active in the brain for longer periods of time than do the brain's other types of neurotransmitters
    (B) some peptides have been found in parts of the body other than the brain, such as the alimentary canal and the skin
    (C) analogues of peptides are easier and less expensive to produce in the laboratory than the peptides themselves
    (D) analogues of the peptides that are found naturally in the body are often filtered from the blood before the blood circulates in the brain
    (E) endorphins interact chemically both with other naturally occurring peptides and with the brain's other neurotransmitters
    Questions 8-11
    In a biologist's laboratory, there are seven unlabele jars. The biologist knows that each of the jars contains dormant bacteria of one of the following types: T, U, V, W, X, Y, Z. She also knows that no two of the jars contain the same type of bacteria. She wishes to identify accurately the type of bacteria in each jar by placing samples of the bacteria into various growth mediums and observing their growth She has only the following information to use in interpreting the results:
    When placed in a suitable medium, dormant bacteria will grow.
    Types U and V each grow only in medium 1.
    Type Y grows only in medium 2.
    Type X grows only in medium 3.
    Type W grows both in medium 1 and in medium 3 but in no other medium.
    Type T and Z each grow both in medium 2 and in medium 3 but in no other medium.
    8. If the biologist places samples of bacteria from one of the jars into mediums 1, 2, and 3 and finds that the bacteria grow only in medium 3, she can properly conclude which of the following?
    (A) The bacteria are of type X.
    (B) The bacteria are of type W.
    (C) The bacteria are of either type W or type X, but which of the two they are cannot be determined without additional information.
    (D) The bacteria are of type T, or type X, or type Y, but which of the three they are cannot be determined without additional information.
    (E) The bacteria are of type W, or type X, or type Z, but which of the three they are cannot be determined without additional information.
    9. The biologist CANNOT accurately differentiate which of the following pairs of bacteria types without obtaining information
    (A) T and Z
    (B) V and W
    (C) W and Y
    (D) W and X
    (E) X and Y
    10. Which of the following is a complete and accurate list of the types of bacteria that the biologist could identify by placing samples of the bacteria into the mediums and observing their growth?
    (A) T, U, W
    (B) T, W, Z
    (C) W, X, Y
    (D) W, Y, Z
    (E) X, Y, Z
    11. All seven types of bacteria could be accurately identified if the biologist obtained additional information that allowed her to identify
    (A) U and W
    (B) U and Z
    (C) X and T
    (D) X and W
    (E) Y and Z
   Questions 12-17
    Five competiors-J. K. L. M and N-have completed the first event of a three-event competition, with K taking first place, L second place, M third place, J fourth place, and N last place.
    The scoring for the three-event competitions is as follows:
    The winner of the first event receives 5 points; the second-place finisher, 4 points; the third-place finisher, 3 points; the fourth-place finisher, 2 points; and the last- place finisher, 1 point.
    The point values for the second and third event are calculated in the same manner, but the score for the second event is counted twice in the total point standings for the entire competition.
    No ties are possible in the individual events. although there can be ties in the total point standing.
    The competitor with the most points after the completion of all three events wins the completion
    12. If K finishes third in the second event, the highest possible winning score for the entire competition is
    (A) 20
    (B) 19
    (C) 18
    (D) 17
    (E) 16
    13. If M and N have the same number of points after the completion of the second event, which of the following CANNOT be true of the outcome of the second event?
    (A) J finished higher than M.
    (B) K finished higher than M.
    (C) M finished second and N finished first.
    (D) M finished third and N finished second.
    (E) M finished fourth and N finished second.
    14. If K and M are in a two-way tie for first in total point standings following the completion of the second event, they must each have how many points?
    (A) 11
    (B) 12
    (C) 13
    (D) 14
    (E) 15
    15. If, in the second event, the competitors finish in the same order that they did in the first event, which of the following could be a possible outcome of the entire competition?
    (A) J finishes second in total point standings.
    (B) K finishes third in total point standings.
    (C) L finishes third in total point standings.
    (D) M finishes first in total point standings.
    (E) N finishes third in total point standings.
    16. If L finishes higher than third in the second event, L's position in the total point standings for the entire competition will be
    (A) alone in first place
    (B) in a tie for first place
    (C) in a tie for second place
    (D) no higher than second place
    (E) no lower than third place
    17. If L finishes first in the second event, the highest that N can finish in the total point standings for the entire competition is
    (A) first
    (B) second
    (C) third
    (D) fourth
    (E) last
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