罡哥gmat逻辑分类 驳斥类

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罡哥GMAT逻辑 驳斥类感觉

1．Guidebook writer: I have visited hotels throughout the country and have noticed that in those built before 1930 the quality of the original carpentry work is generally superior to that in hotels built afterward. Clearly carpenters working on hotels before 1930 typically worked with more skill, care, and effort than carpenters who have worked on hotels built subsequently.

Which of the following, if true, most seriously weakens the guidebook writer's argument?

A. The quality of original carpentry in hotels is generally far superior to the quality of original carpentry in other structures, such as houses and stores.

B. Hotels built since 1930 can generally accommodate more guests than those built before 1930.

C. The materials available to carpenters working before 1930 were not significantly different in quality from the materials available to carpenters working after 1930.

D. The better the quality of original carpentry in a building, the less likely that building is to fall into disuse and be demolished.

E. The average length of apprenticeship for carpenters has declined significantly since 1930.

2．Fearing competition from stores that rent video games for home use, owners of stores that sell video games lobbied for protective legislation. Citing as a precedent legislation that postpones home film rentals until one year after general release to theaters, the video sellers proposed as an equitable solution a plan that would postpone rental of any video game until it had been available for sale for one year.

Which of the following, if true, would support an objection by owners of video rental stores that the fairness of the proposed legislation is not supported by the precedent cited?

A. Although the daily rental fee for home use of films is generally the same as that for video games, the average rental period for a video game is longer than that for a film.

B. Film rentals for home use tend to particularly strong during the first year after a film has been made available for both sale and rental at video rental stores.

C. Most people are interested in playing only the latest video games and tend to find video games that have been available for over a year unappealing whether they have played them before or not, whereas films maintain their appeal far longer after their release.

D. People who rent video games tend to play them by themselves, whereas people who rent films invite friends and neighbors to watch.

E. A slight decline in revenues from films that have been recently released in theaters has been attributed to the growing market for rentals of films for home use.

3．Although the discount stores in Goreville's central shopping district are expected to close within five years as a result of competition from a SpendLess discount department store that just opened, those locations will not stay vacant for long. In the five years since the opening of Colson's, a nondiscount department store, a new store has opened at the location of every store

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in the shopping district that closed because it could not compete with Colson's.

Which of the following, if true, most seriously weakens the argument?

A. Many customers of Colson's are expected to do less shopping there than they did before the SpendLess store opened.

B. Increasingly, the stores that have opened in the central shopping district since Colson's opened have been discount stores.

C. At present, the central shopping district has as many stores operating in it as it ever had.

D. Over the course of the next five years, it is expected that Goreville's population will grow at a faster rate than it has for the past several decades.

E. Many stores in the central shopping district sell types of merchandise that are not available at either SpendLess or Colson's.

4．In parts of the Caribbean, the manatee, an endangered marine mammal, has long been hunted for its meat. Having noted the manatee hunters' expert knowledge of manatees' habits, local conservationists are encouraging the hunters to stop hunting and instead to take tourists on boat rides to see manatees. Tourist interest is high, so the plan has promise of achieving the twin goals of giving the former hunters a good income and helping ensure the manatees' survival.

Which of the following, if true, raises the most serious doubt about the plan's chance of success?

A. Many tourists who visit these parts of the Caribbean are uninterested in manatees and would not be willing to pay what the former manatee hunters would have to charge for boat rides to see manatees.

B. Recovery of the species would enable some hunting to continue without putting the manatees' survival in jeopardy again.

C. In areas where manatees have traditionally been hunted for food, local people could easily replace the manatee meat in their diets with other foods obtained from the sea.

D. There would not be enough former manatee hunters to act as guides for all the tourists who want to see manatees.

E. To maintain their current income, manatee hunters who switched to guiding tourists would have to use far larger boats and make many more trips into the manatees' fragile habitat than they currently do.

5．The OLEX Petroleum Company has recently determined that it could cut its refining costs by closing its Grenville refinery and consolidating all refining at its Tasberg refinery. Closing the Grenville refinery, however, would mean the immediate loss of about 1,200 jobs in the Grenville area. Eventually the lives of more than 10,000 people would be seriously disrupted. Therefore, OLEX's decision, announced yesterday, to keep Grenville open shows that at OLEX social concerns sometimes outweigh the desire for higher profits.

Which of the following, if true, most seriously undermines the argument given?

A. The Grenville refinery, although it operates at a higher cost than the Tasberg refinery, has

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nevertheless been moderately profitable for many years.

B. Even though OLEX could consolidate all its refining at the Tasberg plant, doing so at the Grenville plant would not be feasible.

C. The Tasberg refinery is more favorably situated than the Grenville refinery with respect to the major supply routes for raw petroleum.

D. If the Grenville refinery were ever closed and operations at the Tasberg refinery expanded, job openings at Tasberg would to the extent possible be filled with people formerly employed at Grenville.

E. Closure of the Grenville refinery would mean compliance, at enormous cost, with demanding local codes regulating the cleanup of abandoned industrial sites.

6．Some species of Arctic birds are threatened by recent sharp increases in the population of snow geese, which breed in the Arctic and are displacing birds of less vigorous species. Although snow geese are a popular quarry for hunters in the southern regions where they winter, the hunting season ends if and when hunting has reduced the population by five percent, according to official estimates. Clearly, dropping this restriction would allow the other species to recover.

Which of the following, if true, most seriously undermines the argument?

A. Hunting limits for snow geese were imposed many years ago in response to a sharp decline in the population of snow geese.

B. It has been many years since the restriction led to the hunting season for snow geese being closed earlier than the scheduled date.

C. The number of snow geese taken by hunters each year has grown every year for several years.

D. As their population has increased, snow geese have recolonized wintering grounds that they had not used for several seasons.

E. In the snow goose's winter habitats, the goose faces no significant natural predation.

7．A shortage of orders for Manto Aircraft's airliners has led analysts to predict that the manufacturer will have to lay workers ,the new order that consolidated

airlines has just made for 20 of Manto's model TX jets does not provide a reason for the analysts to revise their predictions ,because simultaneously with its new order , consolidated canceled its existing order for an equal number of manto's larger, more expensive model Z jets

which of the following ,if true, most seriously weakens the argument?

A. Manto relies more heavily on outside subcontractors to provide the labor to manufacture the Model Z than it does the Model TX

B. The Manto employees who currently work to manufacture the model Z are Not proficient at manufacturing the model TX

C. Manto includes all required maintenance work for the first five years in the price of each jet it sells .

D. Manto has had to lay off workers several times within the past ten years but has typically

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rehired many of the workers when it subsequently received new orders

E. A large number of the airliners in consolidated is fleet are at the beginning of their expected service life

8．Twelve years ago and again five years ago, there were extended periods when the Darfir Republic's currency, the pundra, was weak: its value was unusually low relative to the world's most stable currencies. Both times a weak pundra made Darfir's manufactured products a bargain on world markets, and Darfir's exports were up substantially. Now some politicians are saying that, in order to cause another similarly sized increase in exports, the government should allow the pundra to become weak again.

Which of the following, if true, provides the government with the strongest grounds to doubt that the politicians' recommendation, if followed, will achieve its aim?

A. Several of the politicians now recommending that the pundra be allowed to become weak made that same recommendation before each of the last two periods of currency weakness.

B. After several decades of operating well below peak capacity, Darfir's manufacturing sector is now operating at near-peak levels.

C. The economy of a country experiencing a rise in exports will become healthier only if the country's currency is strong or the rise in exports is significant.

D. Those countries whose manufactured products compete with Darfir's on the world market all currently have stable currencies.

E. A sharp improvement in the efficiency of Darfir's manufacturing plants would make Darfir's products a bargain on world markets even without any weakening of the pundra relative to other currencies.

9．According to the Tristate Transportation Authority, making certain improvements to the main commuter rail line would increase ridership dramatically. The authority plans to finance these improvements over the course of five years by raising automobile tolls on the two highway bridges along the route the rail line serves. Although the proposed improvements are indeed needed, the authority's plan for securing the necessary funds should be rejected because it would unfairly force drivers to absorb the entire cost of something from which they receive no benefit.

Which of the following, if true, would cast the most doubt on the effectiveness of the authority's plan to finance the proposed improvements by increasing bridge tolls?

A. Before the authority increases tolls on any of the area bridges, it is required by law to hold public hearings at which objections to the proposed increase can be raised.

B. Whenever bridge tolls are increased, the authority must pay a private contractor to adjust the automated toll-collecting machines.

C. Between the time a proposed toll increase is announced and the time the increase is actually put into effect, many commuters buy more tokens than usual to postpone the effects of the increase.

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D. When tolls were last increased on the two bridges in question, almost 20 percent of the regular commuter traffic switched to a slightly longer alternative route that has since been improved.

E. The chairman of the authority is a member of the Tristate Automobile Club that has registered strong opposition to the proposed toll increase.

10．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.

答案：1—5 DCBEE 6—10 BEBDB