削弱题-CR-PREP 07 test1 ：第11-20题 练习册详情

1

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 46%

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2

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 51%

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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 50%

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4

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 49%

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5

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 69%

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6

A museum has been offered an undocumented statue, supposedly Greek and from the sixth century B.C. Possibly the statue is genuine but undocumented because it was recently unearthed or because it has been privately owned. However, an ancient surface usually has uneven weathering, whereas the surface of this statue has the uniform quality characteristically produced by a chemical bath used by forgers to imitate a weathered surface. Therefore, the statue is probably a forgery.

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

• Museums can accept a recently unearthed statue only with valid export documentation from its country of origin.
• The subject's pose and other aspects of the subject's treatment exhibit all the most common features of Greek statues of the sixth century B.C.
• The chemical bath that forgers use was at one time used by dealers and collectors to remove the splotchy surface appearance of genuinely ancient sculptures.
• Museum officials believe that forgers have no technique that can convincingly simulate the patchy weathering characteristic of the surfaces of ancient sculptures.
• An allegedly Roman sculpture with a uniform surface Similar to that of the statue being offered to the museum was recently shown to be a forgery.

2043人做过此题 平均耗时为6min15s 平均正确率为 51%

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7

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 price will not change.Market research shows that neither subscribers nor advertisers will be lost if the magazine's plan is instituted.

Which of the following, if true, provides the strongest evidence that the magazine's profits are likely to decline if the plan is instituted?

• With the new postage rates, a typical issue under the proposed plan would cost about one-third more to mail than a typical current issue would.
• The majority of the magazine's subscribers are less concerned about a possible reduction in the quantity of the magazine's articles than about a possible loss of the current high quality of its articles.
• Many of the magazine's long-time subscribers would continue their subscriptions even if the subscription price were increased.
• Most of the advertisers that purchase advertising space In the magazine will continue to spend the same amount on advertising per issue as they have in the past.
• Production costs for the magazine are expected to remain stable.

9794人做过此题 平均耗时为17min18s 平均正确率为 63%

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8

Mayor: Migrating shorebirds stop at our beach just to feed on horseshoe-crab eggs, a phenomenon that attracts tourists. To bring more tourists, the town council plans to undertake a beach reclamation project to double the area available to crabs for nesting.

Birdwatcher: Without a high density of crabs on a beach, migrating shorebirds will go hungry because shorebirds only eat eggs that a crab happens to uncover when it is digging its own nest.

Which of the following, if true, would provide the mayor with the strongest counter to the birdwatcher's objection?

• Every year a certain percentage of crabs are caught by fishermen as bait for eel traps.
• Horseshoe crabs are so prolific that given favorable circumstances their numbers increase rapidly.
• On average, tourists who come to the town in order to watch birds spend more money there than tourists who come for other purposes.
• The additional land made available by the reclamation project will give migrating shorebirds more space.
• Some of the migrating shorebirds make only one stop during their migration form South America to Canada.

3850人做过此题 平均耗时为10min31s 平均正确率为 63%

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9

Scientists are discussing ways to remove excess carbon dioxide from the atmosphere by increasing the amount that is absorbed by plant life. One plan to accomplish this is to establish giant floating seaweed farms in the oceans. When the seaweed plants die, they will be disposed of by being burned for fuel.

Which of the following, if true, would indicate the most serious weakness in the plan above?

• Some areas of ocean in the Southern Hemisphere do not contain sufficient nutrients to support large seaweed farms.
• When a seaweed plant is burned, it releases an amount of carbon dioxide comparable to the amount it has absorbed in its lifetime.
• Even if seaweed farms prove effective, some people will be reluctant to switch to this new fuel.
• Each year about seven billion tons of carbon dioxide are released into the atmosphere but only about five billion tons are absorbed by plant life.
• Seaweed farms would make more money by farming seaweed to sell as nutritional supplements than by farming seaweed to sell as fuel.

9954人做过此题 平均耗时为7min49s 平均正确率为 51%

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10

An overwhelming proportion of the most productive employees at SaleCo's regional offices work not eight hours a day, five days a week, as do other SaleCo employees, but rather ten hours a day, four days a week, with Friday off. Noting this phenomenon, SaleCo's president plans to increase overall productivity by keeping the offices closed on Fridays and having all employees work the same schedule-ten hours a day, four days a week.

Which of the following, if true, provides the most reason to doubt that the president's plan, if implemented, will achieve its stated purpose?

• Every employee of SaleCo who has been there for at least a year is entitled to three weeks of vacation each year and must be paid his or her regular salary for that time off.
• None of the employees who work four days a week had volunteered to work that schedule, but all were assigned to it by their supervisors.
• Working ten hours a day has allowed the most productive employees to work two hours alone each day in their respective offices relatively undisturbed by fellow employees.
• Employees at SaleCo are compensated not on the basis of how many hours a week they work but on the basis of how productive they are during the hours they are at work.
• Some of SaleCo's employees have indicated to company officials that they would quit if not allowed to work the same hours as the company's most productive employees.

2873人做过此题 平均耗时为3min42s 平均正确率为 62%

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