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1.D (24021-!-item-!-188;#058&000691)
On Pacific islands, a newly arrived gecko species, the house gecko, is displacing the previously established mourning gecko in urban areas, but populations of the two species are more stable in rural areas far from human settlement. The house gecko does not attack the mourning gecko, but in areas where insects congregate it prevents the mourning gecko from feeding on them.
Which of the following contributes most to an explanation of the difference between gecko populations in urban and rural areas?
(A) In urban areas, geckos are valued because they eat so many insects. (B) Geckos defend territories against other members of the same species. (C) House geckos that arrive on islands are carried there in boats and planes. (D) In places where there are lighted buildings, insects tend to gather around the light. (E) Mourning geckos are all females and reproduce asexually, but house geckos reproduce sexually.
6.E (24353-!-item-!-188;#058&001207) （A为什么不对？） Which of the following most logically completes the passage?
Garnet and RenCo each provide health care for their employees. Garnet pays for both testing of its employees' cholesterol levels and treatment of high cholesterol. This policy saves Garnet money, since high cholesterol left untreated for many years leads to conditions that require very expensive treatment. However, RenCo does not have the same financial incentive to adopt such a policy, because __________.
(A) early treatment of high cholesterol does not entirely eliminate the possibility of a stroke later in life (B) the mass media regularly feature stories encouraging people to maintain diets that are low in cholesterol (C) RenCo has significantly more employees than Garnet has (D) RenCo's employees are unlikely to have higher cholesterol levels than Garnet's employees (E) the average length of time an employee stays with RenCo is less than it is with Garnet
15.B (25986-!-item-!-188;#058&002914) (我选的是E)
Some airlines allegedly reduce fares on certain routes to a level at which they lose money, in order to drive competitors off those routes. However, this method of eliminating competition cannot be profitable in the long run. Once an airline successfully implements this method, any attempt to recoup the earlier losses by charging high fares on that route for an extended period would only provide competitors with a better opportunity to undercut the airline's fares.
Which of the following, if true, most seriously weakens the argument?
(A) In some countries it is not illegal for a company to drive away competitors by selling a product below cost. (B) Airline executives generally believe that a company that once underpriced its fares to drive away competitors is very likely to do so again if new competitors emerge. (C) As part of promotions designed to attract new customers, airlines sometimes reduce their ticket prices to below an economically sustainable level. (D) On deciding to stop serving particular routes, most airlines shift resources to other routes rather than reduce the size of their operations. (E) When airlines dramatically reduce their fares on a particular route, the total number of air passengers on that route increases greatly.
22.A (28162-!-item-!-188;#058&003858) (我选的是E) Herbicides allow cereal crops to be grown very efficiently, with virtually no competition from weeds. In Britain, partridge populations have been steadily decreasing since herbicide use became widespread. Some environmentalists claim that these birds, which live in and around cereal crop fields, are being poisoned by the herbicides. However, tests show no more than trace quantities of herbicides in partridges on herbicide-treated land. Therefore, something other than herbicide use must be responsible for the population decrease.
Which of the following, if true about Britain, most seriously weakens the argument?
(A) The elimination of certain weeds from cereal crop fields has reduced the population of the small insects that live on those weeds and that form a major part of partridge chicks' diet. (B) Since partridges are valued as game birds, records of their population are more carefully kept than those for many other birds. (C) Some of the weeds that are eliminated from cereal crop fields by herbicides are much smaller than the crop plants themselves and would have no negative effect on crop yield if they were allowed to grow. (D) Birds other than partridges that live in or around cereal crop fields have also been suffering population declines. (E) The toxins contained in herbicides typically used on cereal crops can be readily identified in the tissues of animals that have ingested them
33.B (31499-!-item-!-188;#058&006343) (我觉得C也很对) Over the last five years, demand for hotel rooms in Cenopolis has increased significantly, as has the average price Cenopolis hotels charge for rooms. These trends are projected to continue for the next several years. In response to this economic forecast, Centennial Commercial, a real estate developer, is considering a plan to convert several unoccupied office buildings it owns in Cenopolis into hotels in order to maximize its revenues from these properties.
Which of the following would it be most useful for Centennial Commercial to know in evaluating the plan it is considering?
(A) Whether the population of Cenopolis is expected to grow in the next several years (B) Whether demand for office space in Cenopolis is projected to increase in the near future (C) Whether the increased demand for hotel rooms, if met, is likely to lead to an increase in the demand for other travel-related services (D) Whether demand for hotel rooms has also increased in other cities where Centennial owns office buildings (E) Whether, on average, hotels that have been created by converting office buildings have fewer guest rooms than do hotels that were built as hotels
48.D (33231-!-item-!-188;#058&007563)
Certain messenger molecules fight damage to the lungs from noxious air by telling the muscle cells encircling the lungs' airways to contract. This partially seals off the lungs. An asthma attack occurs when the messenger molecules are activated unnecessarily, in response to harmless things like pollen or household dust.
Which of the following, if true, points to the most serious flaw of a plan to develop a medication that would prevent asthma attacks by blocking receipt of any messages sent by the messenger molecules referred to above?
(A) Researchers do not yet know how the body produces the messenger molecules that trigger asthma attacks. (B) Researchers do not yet know what makes one person's messenger molecules more easily activated than another's. (C) Such a medication would not become available for several years, because of long lead times in both development and manufacture. (D) Such a medication would be unable to distinguish between messages triggered by pollen and household dust and messages triggered by noxious air. (E) Such a medication would be a preventative only and would be unable to alleviate an asthma attack once it had started.
51.D (33375-!-item-!-188;#058&007573) (我选的是A) Because postage rates are rising, Home Decorator magazine plans to maximize its profits by reducing by one half the number of issues it publishes each year. The quality of articles, the number of articles published per year, and the subscription price will not change. Market research shows that neither subscribers nor advertisers will be lost if the magazine's plan is instituted.
Which of the following, if true, provides the strongest evidence that the magazine's profits are likely to decline if the plan is instituted?
(A) With the new postage rates, a typical issue under the proposed plan would cost about one-third more to mail than a typical current issue would. (B) The majority of the magazine's subscribers are less concerned about a possible reduction in the quantity of the magazine's articles than about a possible loss of the current high quality of its articles. (C) Many of the magazine's long-time subscribers would continue their subscriptions even if the subscription price were increased. (D) Most of the advertisers that purchase advertising space in the magazine will continue to spend the same amount on advertising per issue as they have in the past. (E) Production costs for the magazine are expected to remain stable.
67.C (34143-!-item-!-188;#058&007613) (我选的是A) Transnational cooperation among corporations is experiencing a modest renaissance among United States firms, even though projects undertaken by two or more corporations under a collaborative agreement are less profitable than projects undertaken by a single corporation. The advantage of transnational cooperation is that such joint international projects may allow United States firms to win foreign contracts that they would not otherwise be able to win.
Which of the following is information provided by the passage?
(A) Transnational cooperation involves projects too big for a single corporation to handle. (B) Transnational cooperation results in a pooling of resources leading to high-quality performance. (C) Transnational cooperation has in the past been both more common and less common than it is now among United States firms. (D) Joint projects between United States and foreign corporations are not profitable enough to be worth undertaking. (E) Joint projects between United States and foreign corporations benefit only those who commission the projects. | 
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发表于 2009-9-14 21:32:00
