削弱题-CR-PREP:第61-70题 练习册详情

1

Crops can be traded on the futures market before they are harvested.If a poor corn harvest is predicted, prices of corn futures rise; if a bountiful corn harvest is predicted, prices of corn futures fall.This morning meteorologists are predicting much-needed rain for the corn-growing region starting tomorrow. Therefore, since adequate moisture is essential for the current crop's survival, prices of corn futures will fall sharply today.

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

• Corn that does not receive adequate moisture during its critical pollination stage will not produce a bountiful harvest.
• Futures prices for corn have been fluctuating more dramatically this season than last season.
• The rain that meteorologists predicted for tomorrow is expected to extend well beyond the corn-growing region.
• Agriculture experts announced today that a disease that has devastated some of the corn crop will spread widely before the end of the growing season.
• Most people who trade in corn futures rarely take physical possession of the corn they trade.

9993人做过此题 平均耗时为13min26s 平均正确率为 61%

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2

Bank depositors in the United States are all financially protected against bank failure because the government insures all individuals' bank deposits.An economist argues that this insurance is partly responsible for the high rate of bank failures, since it removes from depositors any financial incentive to find out whether the bank that holds their money is secure against failure.If depositors were more selective.then banks would need to be secure in order to compete for depositors' money.

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

• Before the government started to insure depositors against bank failure, there was a lower rate of bank failure than there is now.
• When the government did not insure deposits frequent bank failures occurred as a result of depositors' fears of losing money in bank failures.
• Surveys show that a significant proportion of depositors are aware that their deposits are insured by the government.
• There is an upper limit on the amount of an individual's deposit that the government will insure.but very few individuals' deposits exceed this limit.
• The security of a bank against failure depends on the percentage of its assets that are loaned out and also on how much risk its loans involve.

7260人做过此题 平均耗时为5min58s 平均正确率为 63%

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3

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?

• Researchers do not yet know how the body produces the messenger molecules that trigger asthma attacks.
• Researchers do not yet know what makes one person's messenger molecules more easily activated than another's.
• Such a medication would not become available for several years, because of long lead times in both development and manufacture.
• Such a medication would be unable to distinguish between messages triggered by pollen and household dust and messages triggered by noxious air.
• Such a medication would be a preventative only and would be unable to alleviate an asthma attack once it had started.

5814人做过此题 平均耗时为7min27s 平均正确率为 59%

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4

State spokesperson：Many businesspeople who have not been to our state believe that we have an inadequate road system.Those people are mistaken, as is obvious from the fact that in each of the past six years, our state has spent more money per mile on road improvements than any other state.

Which of the following, if true, most seriously undermines the reasoning in the spokesperson's argument?

• In the spokesperson's state, spending on road improvements has been increasing more slowly over the past six years than it has in several other states.
• Adequacy of a state's road system is generally less important to a businessperson considering doing business there than is the availability of qualified employees.
• Over the past six years, numerous businesses have left the spokesperson's state, but about as many businesses have moved into the state.
• In general, the number of miles of road in a state's road system depends on both the area and the population of the state.
• Only states with seriously inadequate road systems need to spend large amounts of money on road improvements.

9992人做过此题 平均耗时为9min49s 平均正确率为 64%

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5

Automobile Dealer's Advertisement：The Highway Traffic Safety Institute reports that the PZ 1000 has the fewest injuries per accident of any car in its class.This shows that the PZ 1000 is one of the safest cars available today.

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

• The Highway Traffic Safety Institute report listed many cars in other classes that had more injuries per accident than did the PZ 1000.
• In recent years many more PZ 1000's have been sold than have any other kind of car in its class.
• Cars in the class to which the PZ 1000 belongs are more likely to be involved in accidents than are other types of cars.
• The difference between the number of injuries per accident for the PZ 1000 and that for other cars in its class is quite pronounced.
• The Highway Traffic Safety Institute issues reports only once a year

9996人做过此题 平均耗时为8min35s 平均正确率为 52%

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6

Start-up companies financed by venture capitalists have a much lower failure rate than companies financed by other means. Source of financing, therefore, must be a more important causative factor in the success of a start-up company than are such factors as the personal characteristics of the entrepreneur, the quality of strategic planning, or the management structure of the company.

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

• Venture capitalists tend to be more responsive than other sources of financing to changes in a start-up company's financial needs.
• The strategic planning of a start-up company is a less important factor in the long-term success of the company than are the personal characteristics of the entrepreneur.
• More than half of all new companies fail within five years.
• The management structures of start-up companies are generally less formal than the management structures of ongoing businesses.
• Venture capitalists base their decisions to fund start.up companies on such factors as the characteristics of the entrepreneur and quality of strategic planning of the company.

4049人做过此题 平均耗时为6min10s 平均正确率为 59%

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7

Reviewer: The book Art's Decline argues that European painters today lack skills that were common among European painters of preceding centuries. In this the book must be right, since its analysis of 100 paintings, 50 old and 50 contemporary, demonstrates convincingly that none of the contemporary paintings are executed as skillfully as the older paintings.

Which of the following points to the most serious logical flaw in the reviewer's argument?

• The paintings chosen by the book's author for analysis could be those that most support the book's thesis.
• There could be criteria other than the technical skill of the artist by which to evaluate a painting.
• The title of the book could cause readers to accept the book's thesis even before they read the analysis of the paintings that supports it.
• The particular methods currently used by European painters could require less artistic skill than do methods used by painters in other parts of the world.
• A reader who was not familiar with the language of art criticism might not be convinced by the book's analysis of the 100 paintings.

1469人做过此题 平均耗时为4min25s 平均正确率为 63%

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8

Unlike the wholesale price of raw wool, the wholesale price of raw cotton has fallen considerably in the last year. Thus, although the retail price of cotton clothing at retail clothing stores has not yet fallen, it will inevitably fall.

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

• The cost of processing raw cotton for cloth has increased during the last year.
• The wholesale price of raw wool is typically higher than that of the same volume of raw cotton.
• The operating costs of the average retail clothing store have remained constant during the last year.
• Changes in retail prices always lag behind changes in wholesale prices.
• The cost of harvesting raw cotton has increased in the last year

4458人做过此题 平均耗时为5min45s 平均正确率为 50%

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9

Since the deregulation of airlines, delays at the nation's increasingly busy airports have increased by 25 percent.To combat this problem, more of the takeoff and landing slots at the busiest airports must be allocated to commercial airlines.

Which of the following, if true, casts the most doubt on the effectiveness of the solution proposed above?

• The major causes of delays at the nation's busiest airports are bad weather and overtaxed air traffic control equipment.
• Since airline deregulation began, the number of airplanes in operation has increased by 25 percent.
• Over 60 percent of the takeoff and landing slots at the nation's busiest airports are reserved for commercial airlines.
• After a small Midwestern airport doubled its allocation of takeoff and landing slots, the number of delays that were reported decreased by 50 percent.
• Since deregulation the average length of delay at the nation's busiest airports has doubled.

6885人做过此题 平均耗时为5min16s 平均正确率为 40%

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10

Treatment for hypertension forestalls certain medical expenses by preventing strokes and heart disease.Yet any money so saved amounts to only one-fourth of the expenditures required to treat the hypertensive population.Therefore, there is no economic justification for preventive treatment for hypertension.

Which of the following, if true, is most damaging to the conclusion above?

• The many fatal strokes and heart attacks resulting from untreated hypertension cause insignificant medical expenditures but large economic losses of other sorts.
• The cost, per patient, of preventive treatment for hypertension would remain constant even if such treatment were instituted on a large scale.
• In matters of health care.Economic considerations should ideally not be dominant.
• Effective prevention presupposes early diagnosis, and programs to ensure early diagnosis are costly.
• The net savings in medical resources achieved by some preventive health measures are smaller than the net losses attributable to certain other measures of this kind.

5982人做过此题 平均耗时为6min28s 平均正确率为 56%

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