CR-OG：第226-240题 练习册详情

1

Although Ackerburg's subway system is currently operating at a deficit, the transit authority will lower subway fares next year. The authority projects that the lower fares will result in a ten percent increase in the number of subway riders. Since the additional income from the larger ridership will more than offset the decrease due to lower fares, the transit authority actually expects the fare reduction to reduce or eliminate the subway system's operating deficit for next year.

Which of the following, if true, provides the most support for the transit authority's expectation of reducing the subway system's operating deficit?

• Throughout the years that the subway system has operated, fares have never before been reduced.
• The planned fare reduction will not apply to students, who can already ride the subway for a reduced fare.
• Next year, the transit authority will have to undertake several large-scale track maintenance projects.
• The subway system can accommodate a ten percent increase in ridership without increasing the number of trains it runs each day.
• The current subway fares in Ackerburg are higher than subway fares in other cities in the region.

3271人做过此题 平均耗时为20min5s 平均正确率为 58%

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2

Consumer health advocate: Your candy company adds caffeine to your chocolate candy bars so that each one delivers a specified amount of caffeine. Since caffeine is highly addictive, this indicates that you intend to keep your customers addicted.

Candy manufacturer: Our manufacturing process results in there being less caffeine in each chocolate candy bar than in the unprocessed cacao beans from which the chocolate is made.

The candy manufacturer's response is flawed as a refutation of the consumer health advocate's argument because it

• fails to address the issue of whether the level of caffeine in the candy bars sold by the manufacture is enough to keep people addicted
• assumes without warrant that all unprocessed cacao beans contain a uniform amount of caffeine
• does not specify exactly how caffeine is lost in the manufacturing process
• treats the consumer health advocate's argument as though it were about each candy bar rather than about the manufacturer's candy in general
• merely contradicts the consumer health advocate's conclusion without giving any reason to believe that the advocate's reasoning is unsound

1546人做过此题 平均耗时为3min30s 平均正确率为 79%

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3

High levels of fertilizer and pesticides, needed when farmers try to produce high yields of the same crop year after year, pollute water supplies. Experts therefore urge farmers to diversify their crops and to rotate their plantings yearly.

To receive governmental price-support benefits for a crop, farmers must have produced that same crop for the past several years.

The statements above, if true, best support which of the following conclusions?

• The rules for governmental support of farm prices work against efforts to reduce water pollution.
• The only solution to the problem of water pollution from fertilizers and pesticides is to take farmland out of production.
• Farmers can continue to make a profit by rotating diverse crops, thus reducing costs for chemicals, but not by planting the same crop each year.
• New farming techniques will be developed to make it possible for farmers to reduce the application of fertilizers and pesticides.
• Governmental price supports for farm products are set at levels that are not high enough to allow farmers to get out of debt.

5679人做过此题 平均耗时为29min31s 平均正确率为 66%

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4

Many office buildings designed to prevent outside air from entering have been shown to have elevated levels of various toxic substances circulating through the air inside, a phenomenon known as sick building syndrome. Yet the air in other office buildings does not have elevated levels of these substances, even though those buildings are the same age as the “sick” buildings and have similar designs and ventilation systems.

Which of the following, if true, most helps to explain why not all office buildings designed to prevent outside air from entering have air that contains elevated levels of toxic substances?

• Certain adhesives and drying agents used in particular types of furniture, carpets, and paint contribute the bulk of the toxic substances that circulate in the air of office buildings.
• Most office buildings with sick building syndrome were built between 1950 and 1990.
• Among buildings designed to prevent outside air from entering, houses are no less likely than office buildings to have air that contains elevated levels of toxic substances.
• The toxic substances that are found in the air of “sick” office buildings are substances that are found in at least small quantities in nearly every building.
• Office buildings with windows that can readily be opened are unlikely to suffer from sick building syndrome.

300人做过此题 平均耗时为2min14s 平均正确率为 74%

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5

A computer equipped with signature-recognition software, which restricts access to a computer to those people whose signatures are on file, identifies a person's signature by analyzing not only the form of the signature but also such characteristics as pen pressure and signing speed.Even the most adept forgers cannot duplicate all of the characteristics the program analyzes.

Which of the following can be logically concluded from the passage above?

• The time it takes to record and analyze a signature makes the software impractical for everyday use.
• Computers equipped with the software will soon be installed In most banks.
• Nobody can gain access to a computer equipped with the software solely by virtue of skill at forging signatures.
• Signature-recognition software has taken many years to develop and perfect.
• In many cases even authorized users are denied legitimate access to computers equipped with the software.

3911人做过此题 平均耗时为18min35s 平均正确率为 64%

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6

Patrick usually provides child care for six children. Parents leave their children at Patrick's house in the morning and pick them up after work. At the end of each workweek, the parents pay Patrick at an hourly rate for the child care provided that week. The weekly income Patrick receives is usually adequate but not always uniform, particularly in the winter, when children are likely to get sick and be unpredictably absent.

Which of the following plans, if put into effect, has the best prospect of making Patrick's weekly income both uniform and adequate?

• Pool resources with a neighbor who provides child care under similar arrangements, so that the two of them cooperate in caring for twice as many children as Patrick currently does.
• Replace payment by actual hours of child care provided with a fixed weekly fee based upon the number of hours of child care that Patrick would typically be expected to provide.
• Hire a full-time helper and invest in facilities for providing child care to sick children.
• Increase the hourly rate to a level that would provide adequate income even in a week when half of the children Patrick usually cares for are absent.
• Increase the number of hours made available for child care each day, so that parents can leave their children in Patrick's care for a longer period each day at the current hourly rate.

3900人做过此题 平均耗时为28min54s 平均正确率为 53%

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7

Which of the following most logically completes the argument below?

Within the earth's core, which is iron, pressure increases with depth. Because the temperature at which iron melts increases with pressure, the inner core is solid and the outer core is molten. Physicists can determine the melting temperature of iron at any given pressure and the pressure for any given depth in the earth. Therefore, the actual temperature at the boundary of the earth's outer and inner cores-the melting temperature of iron there – can be determined, since_______.

• the depth beneath the earth's surface of the boundary between the outer and inner cores is known
• some of the heat from the earth's core flows to the surface of the earth
• pressures within the earth's outer core are much greater than pressures above the outer core
• nowhere in the earth's core can the temperature be measured directly
• the temperatures within the earth's inner core are higher than in the outer core

13人做过此题 平均耗时为40s 平均正确率为 69%

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8

It is often said that high rates of inflation tend to diminish people's incentive to save and invest. This view must be incorrect, however, because people generally saved and invested more of their income in the 1970's when inflation rates were high than they did in the 1980's when inflation rates were low.

Of the following, the best criticism of the argument above is that it overlooks the possibility that

• all people do not respond in the same way to a given economic stimulus
• certain factors operating in the 1980's but not in the 1970's diminished people's incentive to save and invest
• the population was larger in the 1980's than it was in the 1970's
• the proponents of the view cited would stand to gain if inflation rates become lower
• a factor that affects people's savings behavior in a certain way could affect people's investment behavior quite differently

585人做过此题 平均耗时为2min16s 平均正确率为 62%

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9

Which of the following most logically completes the passage?

A business analysis of the Appenian railroad system divided its long-distance passenger routes into two categories: rural routes and interurban routes. The analysis found that, unlike the interurban routes, few rural routes carried a high enough passenger volume to be profitable. Closing unprofitable rural routes, however, will not necessarily enhance the profitability of the whole system, since_________.

• a large part of the passenger volume on interurban routes is accounted for by passengers who begin or end their journeys on rural routes
• within the last two decades several of the least used rural routes have been closed and their passenger services have been replaced by buses
• the rural routes were all originally constructed at least one hundred years ago, whereas some of the interurban routes were constructed recently for new high-speed express trains
• not all of Appenia's large cities are equally well served by interurban railroad services
• the greatest passenger volume, relative to the routes' capacity, is not on either category of long-distance routes but is on suburban commuter routes

2992人做过此题 平均耗时为19min6s 平均正确率为 52%

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10

Nutritionists are advising people to eat more fish, since the omega-3 fatty acids in fish help combat many diseases. If everyone took this advice, however, there would not be enough fish in oceans, rivers, and lakes to supply the demand; the oceans are already being overfished. The obvious method to ease the pressure on wild fish populations is for people to increase their consumption of farmed fish.

Which of the following, if true, raises the most serious doubt concerning the prospects for success of the solution proposed above?

• Aquaculture, or fish farming, raises more fish in a given volume of water than are generally present in the wild.
• Some fish farming, particularly of shrimp and other shellfish, takes place in enclosures in the Ocean.
• There are large expanses of ocean waters that do not contain enough nutrients to support substantial fish populations.
• The feed for farmed ocean fish is largely made from small wild-caught fish, including the young of many popular food species.
• Some of the species that are now farmed extensively were not commonly eaten when they were only available in the wild.

289人做过此题 平均耗时为1min53s 平均正确率为 80%

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11

Premature babies who receive regular massages are more active than premature babies who do not. Even when all the babies drink the same amount of milk, the massaged babies gain more weight than do the unmassaged babies. This is puzzling because a more active person generally requires a greater food intake to maintain or gain weight.

Which of the following, if true, best reconciles the apparent discrepancy described above?

• Increased activity leads to increased levels of hunger, especially when food intake is not also increased.
• Massage increases premature babies' curiosity about their environment, and curiosity leads to increased activity.
• Increased activity causes the intestines of premature babies to mature more quickly, enabling the babies to digest and absorb more of the nutrients in the milk they drink.
• Massage does not increase the growth rate of babies over one year old, if the babies had not been previously massaged.
• Premature babies require a daily intake of nutrients that is significantly higher than that required by babies who were not born prematurely.

5人做过此题 平均耗时为59s 平均正确率为 60%

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12

Ten years ago the number of taxpayers in Green County was slightly greater than the number of registered voters. The number of taxpayers has doubled over the last ten years, while the number of registered voters has increased, but at a lower rate than has the number of taxpayers.

Which of the following must be true in Greenspace County if the statements above are true?

• The number of taxpayers is now smaller than the number of registered voters.
• Everyone who is a registered voter is also a taxpayer.
• The proportion of registered voters to taxpayers has increased over the last ten years.
• The proportion of registered voters to taxpayers has decreased over the last ten years.
• The proportion of registered voters to taxpayers has remained unchanged over the last ten years.

2953人做过此题 平均耗时为15min48s 平均正确率为 56%

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13

An eyeglass manufacturer tried to boost sales for the summer quarter by offering its distributors a special discount if their orders for that quarter exceeded those for last year's summer quarter by at least 20 percent.Many distributors qualified for this discount.Even with much merchandise discounted, sales increased enough to produce a healthy gain in net profits.The manufacturer plans to repeat this success by offering the same sort of discount for the fall quarter.

Which of the following, if true, most clearly points to a flaw in the manufacturer's plan to repeat the successful performance of the summer quarter?

• In general, a distributor's orders for the summer quarter are no higher than those for the spring quarter.
• Along with offering special discounts to qualifying distributors, the manufacturer increased newspaper and radio advertising in those distributors' sales areas.
• The distributors most likely to qualify for the manufacturer's special discount are those whose orders were unusually low a year earlier.
• The distributors who qualified for the manufacturer's special discount were free to decide how much of that discount to pass on to their own customers.
• The distributors' ordering more goods in the summer quarter left them overstocked for the fall quarter.

1350人做过此题 平均耗时为5min29s 平均正确率为 82%

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14

Laws requiring the use of headlights during daylight hours can prevent automobile collisions. However,since daylight visibility is worse in countries farther from the equator, any such laws would obvisouly be moreeffective in preventing collisions in those countries. In fact, the only countries that actually have such laws arefarther from the equator than is the continental United States.

Which of the following conclusions could be most properly drawn from the information given above?

• Drivers in the continental United States who used their headlines during the day would be just as likely to become involved in a collision as would drivers who did not use their headlights.
• In many countries that are farther from the equator than is the continental United States poor daylight visilibty is the single most important factor in automobile collisions.
• The proportion of automobile collisions that occur in the daytime is greater in the continental United States than in the countries that have daytime headlight laws.
• Fewer automobile collisions probably occur each year in countries that have daytime headlight laws than occur within the continental United States.
• Daytime headlight laws would probably do less to prevent automobile collisions in the continental United States than they do in the countries that have the laws.

2682人做过此题 平均耗时为8min6s 平均正确率为 64%

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15

Art restorers who have been studying the factors that cause Renaissance oil paintings to deteriorate physically when subject to climatic changes have found that the oil paint used in these paintings actually adjusts to these changes well. The restorers therefore hypothesize that it is a layer of material called gesso, which is under the paint, that causes the deterioration.

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

• Renaissance oil paintings with a thin layer of gesso are less likely to show deterioration in response to climatic changes than those with a thicker layer.
• Renaissance oil paintings are often painted on wooden panels, which swell when humidity increases and contract when it declines.
• Oil paint expands and contracts readily in response to changes in temperature, but it absorbs little water and so is little affected by changes in humidity.
• An especially hard and nonabsorbent type of gesso was the raw material for moldings on the frames of Renaissance oil paintings.
• Gesso layers applied by Renaissance painters typically consisted of a coarse base layer onto which several increasingly fine-grained layers were applied.

725人做过此题 平均耗时为3min7s 平均正确率为 73%

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