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GMAT逻辑削弱题例题二

2018-04-30 17:08:00来源：网络

　　A. County X and County Y are adjacent to each other, and both are located in the windiest area of the state.

　　B. The total population of County Y is substantially greater than that of County X.

　　C. Some of the electricity generated by wind farms in County Y would be purchased by users outside the county.

　　D. Wind farms require more land per unit of electricity generated than does any other type of electrical-generation facility.

　　E. Nearly all of County X’s population is concentrated in a small part of the county, while County Y’s population is spread evenly throughout the country.

　　9. (Z5)Of patients over 65 years old who survived coronary bypass surgery—a procedure widely prescribed for people with heart disease—only 75 percent benefited from the surgery. Thus it appears that for one in four such patients, the doctors who advised them to undergo this surgery, with its attendant risks and expense, were more interested in an opportunity to practice their skills and in their fee than in helping the patient.

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

　　A. Many of the patients who receive coronary bypass surgery are less than 55 years old.

　　B. Possible benefits of coronary bypass surgery include both relief from troubling symptoms and prolongation of life.

　　C. Most of the patients in the survey decided to undergo coronary bypass surgery because they were advised that the surgery would reduce their risk of future heart attacks.

　　D. The patients over 65 years old who did not benefit from the coronary bypass surgery were as fully informed as those who did benefit from the surgery as to the risks of the surgery prior to undergoing it.

　　E. The patients who underwent coronary bypass surgery but who did not benefit from it were medically indistinguishable, prior to their surgery, from the patients who did benefit.

　　10.(Z5-30)Printwell’s Ink Jet Division manufactures ink-jet printers and the ink cartridges they use. Sales of its ink-jet printers have increased. Monthly revenues from those sales, however, have not increased, because competition has forced Printwell to cut the prices of its printers. Unfortunately, Printwell has been unable to bring down the cost of manufacturing a printer. Thus, despite the increase in printer sales, the Ink Jet Division must be providing the company with much smaller than it used to.

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

　　A. Ink-jet printers in regular use frequently need new ink cartridges, and Printwell’s printers only accept Printwell’s ink cartridges.

　　B. Unlike some competing companies, Printwell sells all of its printers through retailers, and these retailers’ costs account for a sizable proportion of the printers’ ultimate retail price.

　　C. Some printer manufacturers have been forced to reduce the sale price of their ink-jet printers even more than Printwell has.

　　D. In the past year, no competing manufacturer of ink-jet printers has had as great an increase in unit sales of printers as Printwell has.

　　E. In the past year, sales of Printwell’s ink-jet printers have increased more than sales of any other type of printer made by Printwell.

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