gmat逻辑分类 旧prep2加强题目.docx

1、gmat逻辑分类 旧prep2加强题目18. (26912-!-item-!-188;#058&003382)The Calex Telecommunications Company is planning to introduce cellular telephone service into isolated coastal areas of Caladia, a move which will require considerable investment. However, the only significant economic activity in these areas is

2、 small-scale coffee farming, and none of the coffee farmers make enough money to afford the monthly service fees that Calex would have to charge to make a profit. Nevertheless, Calex contends that making the service available to these farmers will be profitable.Which of the following, if true, provi

3、des the strongest support for Calexs contention?(A) Currently, Caladian coffee farmers are forced to sell their coffee to local buyers at whatever price those buyers choose to pay because the farmers are unable to remain in contact with outside buyers who generally offer higher prices.(B) In the coa

4、stal areas of Caladia where Calex proposes to introduce cellular telephone service, there is currently no fixed-line telephone service because fixed-line companies do not believe that they could recoup their investment.(C) A cellular telephone company can break even with a considerably smaller numbe

5、r of subscribers than a fixed-line company can, even in areas such as the Caladian coast, where there is no difficult terrain to drive up the costs of installing fixed lines.(D) Calex bases its monthly fees for cellular telephone service in a given region partly on the cost of installing the necessa

6、ry equipment to provide the service there.(E) Calex has for years made a profit on cellular telephone service in Caladias capital city, which is not far from the coastal region.21. (28114-!-item-!-188;#058&003832)Film Director: It is true that certain characters and plot twists in my newly released

7、film The Big Heist are strikingly similar to characters and plot twists in Thieves, a movie that came out last year. Based on these similarities, the film studio that produced Thieves is now accusing me of taking ideas from that film. The accusation is clearly without merit. All production work on T

8、he Big Heist was actually completed months before Thieves was released.Which of the following, if true, provides the strongest support for the directors rejection of the accusation?(A) Before Thieves began production, its script had been circulating for several years among various film studios, incl

9、uding the studio that produced The Big Heist.(B) The characters and plot twists that are most similar in the two films have close parallels in many earlier films of the same genre.(C) The film studio that produced Thieves seldom produces films in this genre.(D) The director of Thieves worked with th

10、e director of The Big Heist on several earlier projects.(E) The time it took to produce The Big Heist was considerably shorter than the time it took to produce Thieves.24. (28903-!-item-!-188;#058&004064)Although exposure to asbestos is the primary cause of mesothelioma, a slow-developing cancer, re

11、searchers believe that infection by the SV40 virus is a contributing cause, since in the United States 60 percent of tissue samples from mesotheliomas, but none from healthy tissue, contain SV40. SV40 is a monkey virus; however, in 1960 some polio vaccine was contaminated with the virus. Researchers

12、 hypothesize that this vaccine was the source of the virus found in mesotheliomas decades later.Which of the following, if true, most strongly supports the researchers hypothesis?(A) SV40 is widely used as a research tool in cancer laboratories.(B) Changes in the technique of manufacturing the vacci

13、ne now prevent contamination with SV40.(C) Recently discovered samples of the vaccine dating from 1960 still show traces of the virus.(D) In a small percentage of cases of mesothelioma, there is no history of exposure to asbestos.(E) In Finland, where the polio vaccine was never contaminated, sample

14、s from mesotheliomas do not contain SV40.25. (30469-!-item-!-188;#058&005456)In the past year Harborville has had an unusually high rate of new cases of a certain disease. An investigation revealed that over the past five years Harborvilles public water supply has had a high level of pollutants. Med

15、ical researchers have hypothesized that Harborvilles water is responsible for the high rate of new cases of the disease.Each of the following, if true, provides additional support for the researchers hypothesis EXCEPT:(A) Most of the people afflicted with new cases of the disease had regularly drunk

16、 larger quantities of Harborvilles water than had other Harborville residents.(B) The same type of pollutants that were found in Harborvilles water have independently been linked to occurrences in other towns of high rates of the disease.(C) Some of the people with newly diagnosed cases of the disea

17、se began to develop the disease before Harborvilles water became polluted.(D) The rate of new cases of the disease among residents of Harborville who get their water from private sources is not unusually high.(E) Towns with geographic and demographic characteristics similar to those of Harborville b

18、ut without polluted water do not have as high a rate of the disease as does Harborville.26. (30517-!-item-!-188;#058&005463)A new commercial radio station in Greenfield plans to play songs that were popular hits fifteen to twenty-five years ago. It hopes in this way to attract an audience made up ma

19、inly of people between thirty-five and forty-five years old and thereby to have a strong market appeal to advertisers.Each of the following, if true, strengthens the prospects that the radio stations plan will succeed EXCEPT:(A) People tend to remain very fond of the music that they heard when they

20、were in their teens and early twenties.(B) In a number of cities demographically similar to Greenfield, radio stations that play recordings of popular music from fifteen to twenty-five years ago have succeeded commercially.(C) People in the thirty-five- to forty-five-year-old age group are more like

21、ly to listen to the radio for news than for music.(D) The thirty-five- to forty-five-year-old age group is one in which people tend to have comparatively high levels of income and are involved in making household purchases.(E) Among the few radio stations in the Greenfield area, there is none that p

22、lays music from this particular period for more than a few hours per week.37. (32151-!-item-!-188;#058&006653)The use of radar detectors in commercial vehicles was banned because commercial truck and bus drivers were using these devices to drive faster than the posted speed limit without fear of arr

23、est. Since drivers of noncommercial vehicles also use radar detectors and since speeding decreases safety for any vehicle, use of radar detectors should also be banned in noncommercial vehicles to increase safety.Which of the following, if true, most strongly supports the argument above?(A) The aver

24、age noncommercial-vehicle driver is involved in less long-distance driving than is the average commercial-vehicle driver.(B) In many places airplanes or helicopters are used rather than radar to locate vehicles traveling faster than the posted speed limit.(C) The ban on radar detectors in commercial

25、 vehicles has been effective in deterring them from speeding.(D) Traffic accidents involving a truck or bus generally pose a greater threat of injury or death than do other accidents.(E) Radar detectors are sometimes set off by devices other than the law enforcement devices that the radar detectors

26、were built to detect.43. (32991-!-item-!-188;#058&007555)Half of the subjects in an experiment-the experimental group-consumed large quantities of a popular artificial sweetener. Afterward, this group showed lower cognitive abilities than did the other half of the subjects-the control group-who did

27、not consume the sweetener. The detrimental effects were attributed to an amino acid that is one of the sweeteners principal constituents.Which of the following, if true, would best support the conclusion that some ingredient of the sweetener was responsible for the experimental results?(A) Most cons

28、umers of the sweetener do not consume as much of it as the experimental group members did.(B) The amino acid referred to in the conclusion is a component of all proteins, some of which must be consumed for adequate nutrition.(C) The quantity of the sweetener consumed by individuals in the experiment

29、al group is considered safe by federal food regulators.(D) The two groups of subjects were evenly matched with regard to cognitive abilities prior to the experiment.(E) A second experiment in which subjects consumed large quantities of the sweetener lacked a control group of subjects who were not gi

30、ven the sweetener.51. (33375-!-item-!-188;#058&007573)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

31、price will not change. Market research shows that neither subscribers nor advertisers will be lost if the magazines plan is instituted.Which of the following, if true, provides the strongest evidence that the magazines profits are likely to decline if the plan is instituted?(A) With the new postage

32、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 magazines subscribers are less concerned about a possible reduction in the quantity of the magazines articles than about a possible loss of the current high quality of its articles.(C) Many of the magazines 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 spen