2007年GMAT考试最新逻辑推理试题训练八(3)

网络资源 Freekaoyan.com/2008-04-10

Questions 10-11 are based on the following.
Partly because of bad weather, but also partly because some major pepper growers have switched to high-priced cocoa, world production of pepper has been running well below worldwide sales for three years. Pepper is consequently in relatively short supply. The price of pepper has soared in response: it now equals that of cocoa.

10.   Which of the following can be inferred from the passage?
(A) Pepper is a profitable crop only if it is grown on a large scale.
(B) World consumption of pepper has been unusually high for three years.
(C) World production of pepper will return to previous levels once normal weather returns.
(D) Surplus stocks of pepper have been reduced in the past three years.
(E) The profits that the growers of pepper have made in the past three years have been unprecedented.
11.   Some observers have concluded that the rise in the price of pepper means that the switch by some growers from pepper to cocoa left those growers no better off than if none of them had switched; this conclusion, however, is unwarranted because it can be inferred to be likely that
(A) those growers could not have foreseen how high the price of pepper would go
(B) the initial cost involved in switching from pepper to cocoa is substantial
(C) supplies of pepper would not be as low as they are if those growers had not switched crops
(D) cocoa crops are as susceptible to being reduced by bad weather as are pepper crops
(E) as more growers turn to growing cocoa, cocoa supplies will increase and the price of cocoa will fall precipitously

12.   Using computer techniques, researchers analyze layers of paint that lie buried beneath the surface layers of old paintings. They claim, for example, that additional mountainous scenery once appeared in Leonardo da Vinci’s Mona Lisa, which was later painted over. Skeptics reply to these claims, however, that X-ray examinations of the Mona Lisa do not show hidden mountains.
Which of the following, if true, would tend most to weaken the force of the skeptics’ objections?
(A) There is no written or anecdotal record that Leonardo da Vinci ever painted over major areas of his Mona Lisa.
(B) Painters of da Vinci’s time commonly created images of mountainous scenery in the backgrounds of portraits like the Mona Lisa.
(C) No one knows for certain what parts of the Mona Lisa may have been painted by da Vinci’s assistants rather than by da Vinci himself.
(D) Infrared photography of the Mona Lisa has revealed no trace of hidden mountainous scenery.
(E) Analysis relying on X-rays only has the capacity to detect lead-based white pigments in layers of paint beneath a painting’s surface layers.

13.   While Governor Verdant has been in office, the state’s budget has increased by an average of 6 percent each year. While the previous governor was in office, the state’s budget increased by an average of 11.5 percent each year. Obviously, the austere budgets during Governor Verdant’s term have caused the slowdown in the growth in state spending.
Which of the following, if true, would most seriously weaken the conclusion drawn above?
(A) The rate of inflation in the state averaged 10 percent each year during the previous governor’s term in office and 3 percent each year during Verdant’s term.
(B) Both federal and state income tax rates have been lowered considerably during Verdant’s term in office.
(C) In each year of Verdant’s term in office, the state’s budget has shown some increase in spending over the previous year.
(D) During Verdant’s term in office, the state has either discontinued or begun to charge private citizens for numerous services that the state offered free to citizens during the previous governor’s term.
(E) During the previous governor’s term in office, the state introduced several so-called “austerity” budgets intended to reduce the growth in state spending.

14.   Federal agricultural programs aimed at benefiting one group whose livelihood depends on farming often end up harming another such group.
Which of the following statements provides support for the claim above?
I.     An effort to help feed-grain producers resulted in higher prices for their crops, but the higher prices decreased the profits of livestock producers.
II.    In order to reduce crop surpluses and increase prices, growers of certain crops were paid to leave a portion of their land idle, but the reduction was not achieved because improvements in efficiency resulted in higher production on the land in use.
III.   Many farm workers were put out of work when a program meant to raise the price of grain provided grain growers with an incentive to reduce production by giving them surplus grain from government reserves.
(A) I, but not II and not III
(B) II, but not I and not III
(C) I and III, but not II
(D) II and III, but not I
(E) I, II and III

15.       Technological education is worsening. People between eighteen and twenty-four, who are just emerging from their formal education, are more likely to be technologically illiterate than somewhat older adults. And yet, issues for public referenda will increasingly involve aspects of technology.
Which of the following conclusions can be properly drawn from the statements above?
(A) If all young people are to make informed decisions on public referenda, many of them must learn more about technology.
(B) Thorough studies of technological issues and innovations should be made a required part of the public and private school curriculum.
(C) It should be suggested that prospective voters attend applied science courses in order to acquire a minimal competency in technical matters.
(D) If young people are not to be overly influenced by famous technocrats, they must increase their knowledge of pure science.
(E) On public referenda issues, young people tend to confuse real or probable technologies with impossible ideals.

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