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2007年GMAT考试最新逻辑推理仿真试题训练十五(4)

2007-11-02 16:37

  16.Sales of telephones have increased dramatically over the last year. In order to take advantage of this increase, Mammoth Industries plans to expand production of its own model of telephone, while continuing its already very extensive advertising of this product.Which of the following, if true, provides most support for the view that Mammoth Industries cannot increase its sales of telephones by adopting the plan outlined above?

 。ˋ) Although it sells all of the telephones that it produces, Mammoth Industries' share of all telephone sales has declined over the last year.
 。˙) Mammoth Industries' average inventory of telephones awaiting shipment to retailers has declined slightly over the last year.
 。–) Advertising has made the brand name of Mammoth Industries' telephones widely known, but few consumers know that Mammoth Industries owns this brand.
 。―) Mammoth Industries' telephone is one of three brands of telephone that have together accounted for the bulk of the last year's increase in sales.
 。‥) Despite a slight decline in the retail price, sales of Mammoth Industries' telephones have fallen in the last year.

  17.Many institutions of higher education suffer declining enrollments during periods of economic slowdown. At two-year community colleges, however, enrollment figures boom during these periods when many people have less money and there is more competition for jobs.Each of the following, if true, helps to explain the enrollment increases in two-year community colleges described above EXCEPT:

 。ˋ) During periods of economic slowdown, two-year community colleges are more likely than four-year colleges to prepare their students for the jobs that are still available.
 。˙) During periods of economic prosperity, graduates of two-year community colleges often continue their studies at four-year colleges.
 。–) Tuition at most two-year community colleges is a fraction of that at four-year colleges.
 。―) Two-year community colleges devote more resources than do other colleges to attracting those students especially affected by economic slowdowns.
 。‥) Students at two-year community colleges, but not those at most four-year colleges, can control the cost of their studies by choosing the number of courses they take each term.

  Questions 18-19 are based on the following.

  Hardin argued that grazing land held in common (that is, open to any user) would always be used less carefully than private grazing land. Each rancher would be tempted to overuse common land because the benefits would accrue to the individual, while the costs of reduced land quality that results from overuse would be spread among all users. But a study comparing 217 million acres of common grazing land with 433 million acres of private grazing land showed that the common land was in better condition.

  18.The answer to which of the following questions would be most useful in evaluating the significance, in relation to Hardin's claim, of the study described above?

 。ˋ) Did any of the ranchers whose land was studied use both common and private land?
 。˙) Did the ranchers whose land was studied tend to prefer using common land over using private land for grazing?
 。–) Was the private land that was studied of comparable quality to the common land before either was used for grazing?
 。―) Were the users of the common land that was studied at least as prosperous as the users of the private land?
 。‥) Were there any owners of herds who used only common land, and no private land, for grazing?

  19.Which of the following, if true, and known by the ranchers, would best help explain the results of the study?

 。ˋ) With private grazing land, both the costs and the benefits of overuse fall to the individual user.
 。˙) The cost in reduced land quality that is attributable to any individual user is less easily measured with common land than it is with private land.
 。–) An individual who overuses common grazing land might be able to achieve higher returns than other users can, with the result that he or she would obtain a competitive advantage.
 。―) If one user of common land overuses it even slightly, the other users are likely to do so even more, with the consequence that the costs to each user outweigh the benefits.
 。‥) There are more acres of grazing land held privately than there are held in common.

  20.In tests for pironoma, a serious disease, a false positive result indicates that people have pironoma when, in fact, they do not; a false negative result indicates that people do not have pironoma when, in fact, they do. To detect pironoma most accurately, physicians should use the laboratory test that has the lowest proportion of false positive results.Which of the following, if true, gives the most support to the recommendation above?

 。ˋ) The accepted treatment for pironoma does not have damaging side effects.
 。˙) The laboratory test that has the lowest proportion of false positive results causes the same minor side effects as do the other laboratory tests used to detect pironoma.
 。–) In treating pironoma patients, it is essential to begin treatment as early as possible, since even a week of delay can result in loss of life.
 。―) The proportion of inconclusive test results is equal for all laboratory tests used to detect pironoma.
 。‥) All laboratory tests to detect pironoma have the same proportion of false negative results.

  参考答案:

  1.E  2.A  3.B  4.D  5.C

  6.A  7.A  8.B  9.E  10.B

  11.A  12.A  13.E  14.B  15.B

  16.E  17.B  18.C  19.D  20.E

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