加强题-CR-PREP：第11-20题 练习册详情

1

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 arrest. 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?

• The average noncommercial-vehicle driver is involved in less long-distance driving than is the average commercial-vehicle driver.
• In many places airplanes or helicopters are used rather than radar to locate vehicles traveling faster than the posted speed limit.
• The ban on radar detectors in commercial vehicles has been effective in deterring them from speeding.
• Traffic accidents involving a truck or bus generally pose a greater threat of injury or death than do other accidents.
• Radar detectors are sometimes set off by devices other than the law enforcement devices that the radar detectors were built to detect.

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2

When people evade income taxes by not declaring taxable income, a vicious cycle results. Tax evasion forces lawmakers to raise income tax rates, which causes the tax burden on nonevading taxpayers to become heavier. This, in turn, encourages even more taxpayers to evade income taxes by hiding taxable income.

The vicious cycle described above could not result unless which of the following were true?

• An increase in tax rates tends to function as an incentive for taxpayers to try to increase their pretax incomes.
• Some methods for detecting tax evaders, and thus recovering some tax revenue lost through evasion, bring in more than they cost, but their success rate varies from year to year.
• When lawmakers establish income tax rates in order to generate a certain level of revenue, they do not allow adequately for revenue that will be lost through evasion.
• No one who routinely hides some taxable income can be induced by a lowering of tax rates to stop hiding such income unless fines for evaders are raised at the same time.
• Taxpayers do not differ from each other with respect to the rate of taxation that will cause them to evade taxes.

6897人做过此题 平均耗时为19min26s 平均正确率为 60%

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3

When three Everett-owned Lightning-built airplanes crashed in the same month, the Everett company ordered three new Lightning-built airplanes as replacements. This decision surprised many in the airline industry because, ordinarily when a product is involved in accidents, users become reluctant to buy that product.

Which of the following, if true, provides the best indication that the Everett company's decision was logically well supported?

• Although during the previous year only one Lightning-built airplane crashed, competing manufacturers had a perfect safety record.
• The Lightning-built airplanes crashed due to pilot error, but because of the excellent quality of the planes there were many survivors.
• The Federal Aviation Association issued new guidelines for airlines in order to standardize safety requirements governing preflight inspections.
• Consumer advocates pressured two major airlines into purchasing safer airplanes so that the public would be safer while flying.
• Many Lightning Airplane Company employees had to be replaced because they found jobs with the competition.

4753人做过此题 平均耗时为6min21s 平均正确率为 47%

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4

The cotton farms of Country Q became so productive that the market could not absorb all that they produced. Consequently, cotton prices fell. The government tried to boost cotton prices by offering farmers who took 25 percent of their cotton acreage out of production direct support payments up to a specified maximum per farm.

The government's program, if successful, will not be a net burden on the budget. Which of the following, if true, is the best basis for an explanation of how this could be so?

• Depressed cotton prices meant operating losses for cotton farms, and the government lost revenue from taxes on farm profits.
• Cotton production in several countries other than Q declined slightly the year that the support-payment program went into effect in Q.
• The first year that the support-payment program was in effect, cotton acreage in Q was 5% below its level in the base year for the program.
• The specified maximum per farm meant that for very large cotton farms the support payments were less per acre for those acres that were withdrawn from production than they were for smaller farms.
• Farmers who wished to qualify for support payments could not use the cotton acreage that was withdrawn from production to grow any other crop.

7849人做过此题 平均耗时为8min26s 平均正确率为 69%

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5

Manufacturers of mechanical pencils make most of their profit on pencil leads rather than on the pencils themselves. The Write Company, which cannot sell its leads as cheaply as other manufacturers can, plans to alter the design of its mechanical pencil so that it will accept only a newly designed Write Company lead, which will be sold at the same price as the Write Company's current lead.

Which of the following, if true, most strongly supports the Write Company's projection that its plan will lead to an increase in its sales of pencil lead?

• First-time buyers of the mechanical pencils tend to buy the least expensive mechanical pencils available.
• Annual sales of mechanical pencils are expected to triple over the next five years.
• A Write Company executive is studying ways to reduce the cost of manufacturing pencil leads.
• A rival manufacture recently announced similar plans to introduce a mechanical pencil that would accept only the leads produced by that manufacturer.
• In extensive text marketing, mechanical-pencil users found the new Write Company pencil markedlysuperior to other mechanical pencils they had used.

1641人做过此题 平均耗时为5min36s 平均正确率为 41%

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6

In the year following an eight-cent increase in the federal tax on a pack of cigarettes, sales of cigarettes fell ten percent. In contrast, in the year prior to the tax increase, sales had fallen one percent. The volume of cigarette sales is therefore strongly related to the after-tax price of a pack of cigarettes.

Which of the following, if true, would most strengthen the argument above?

• During the second year after the tax increase, cigarette sales increased by a significant amount.
• The information available to consumers on the health risks of smoking remained largely unchanged in the period before and after the tax increase.
• Most consumers were unaware that the tax on cigarettes was going to increase.
• During the year following the cigarette tax increase, many consumers had less income, in inflation-adjusted dollars, than they had had in the previous year.
• During the year after the tax increase, there was a greater variety of cigarettes on the market than there had been during the previous year.

6909人做过此题 平均耗时为8min22s 平均正确率为 41%

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7

To improve the long-term savings rate of the citizens of Levaska, the country's legislature decided to implement a plan that allows investors to save up to $1,000 per year in special accounts without paying taxes on the interest earned unless withdrawals are made before the investor reaches age sixty-five. Withdrawals from these accounts prior to age sixty-five would result in the investor's having to pay taxes on all the accumulated interest at the time of withdrawal.

Which of the following, if true, most strongly supports the prediction that the legislature's plan will have its intended effect?

• The money saved in the tax-free savings accounts will be deposited primarily in those banks and financial institutions that supported the legislation instituting the plan.
• The majority of people choosing to take advantage of the tax-free savings accounts will withdraw their money prior to age sixty-five.
• A significant number of the citizens of Levaska will invest in the tax-free savings accounts well before they reach the age of sixty-five.
• During the ten years prior to implementation of the plan, Levaskans deposited an increasingly smaller percentage of their annual income in long-term savings accounts.
• People who are not citizens of Levaska are not eligible to invest in the tax-free savings accounts, even if their income is taxable in Levaska.

6033人做过此题 平均耗时为8min12s 平均正确率为 55%

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8

In Europe, many large animal species, such as mammoths, became extinct soon after humans first migrated to the animals' areas of habitation. The spread of such extinctions closely followed the pattern of human migration. However, since humans tended to migrate to areas as the climate in those areas began to warm, the extinctions might have been precipitated by the climatic warming rather than by human migration.

Which of the following, if true, provides the best evidence that it was human migration and not climatic change that precipitated the extinctions?

• Many animal species, such as deer and bison, continued to thrive in Europe even after humans migrated there.
• Several periods of marked climatic warming have occurred in Europe, during which many large animal species that lived there became extinct.
• Many animal species that became extinct in Europe survived longer in areas that were isolated from human populations but that experienced intense climatic warming.
• In some areas of Europe, only a few archaeological sites have yielded evidence that shows an overlap between the arrival of humans and the extinction of large animals.
• Some large animals had become extinct in Europe even before humans migrated there.

6528人做过此题 平均耗时为5min0s 平均正确率为 70%

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9

When feeding, aquatic birds known as phalaropes often spin rapidly on the water's surface, pecking for food during each revolution. To execute these spins, phalaropes kick one leg harder than the other. This action creates upwelling currents. Because plankton on which phalaropes feed typically occurs in greater quantities well below the surface, it is hypothesized that by spinning phalaropes gain access to food that would otherwise be beyond their reach.

Which of the following, if true, most strongly supports the hypothesis?

• Phalaropes rarely feed while on land.
• A given phalarope spins exclusively either to the right or to the left.
• Phalaropes sometimes spin when they are not feeding.
• Different phalaropes spin at somewhat different rates.
• Phalaropes do not usually spin when food is abundant at the surface.

5935人做过此题 平均耗时为6min46s 平均正确率为 70%

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10

In Borania many people who want to quit smoking wear nicotine skin patches, which deliver small doses of nicotine through the skin. Beginning next month, these patches can be purchased without a doctor's prescription. Although nonprescription patches will be no more effective than those obtained by prescription and will be equally expensive, patch manufacturers are nevertheless predicting that the patches' new nonprescription status will boost sales, which have slowed considerably in recent years.

Which of the following, if true in Borania, most strongly supports the manufacturers' prediction?

• Most people who wanted to quit smoking and who found the nicotine skin patch helpful in quitting have quit.
• Nicotine skin patches generally cost more to use than do other types of aids that help people to quit smoking.
• Several nonprescription aids aimed at helping people to quit smoking have been widely available for a number of years.
• Many smokers who want to quit smoking feel that they cannot afford to visit a doctor for a prescription.
• People who use nicotine skin patches have approximately the same rate of success in quitting smoking as do people who use other aids aimed at helping people to quit smoking.

6346人做过此题 平均耗时为7min12s 平均正确率为 48%

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