A.Emigration from Prenland is more common among women than among men.
B.A greater proportion of Prenlandic women in their thirties than of Prenlandic men of the same age would prefer to remain unmarried.
C.It is unlikely that many of these unmarried Prenlandic men will marry women more than a few years older than themselves.
D.Prenland has a high rate of divorce.
E.Most of the unmarried Prenlandic men are unwilling to marry women who are not Prenlandic.
第1题
moved to hostility and aggression than are college athletes in noncontact sports such as swimming. But the researchers conclusion—that contact sports encourage and teach participants to be hostile and aggressive—is untenable. The football and hockey players were probably more hostile and aggressive to start with than the simmers. Which of the following, if true, would most strengthen the conclusion drawn by the psychological researchers?
A.The football and hockey players became more hostile and aggressive during the season and remained so during the off-season, whereas there was no increase in aggressiveness among the swimmers.
B.The football and hockey players, but not the swimmers were aware at the start of the experiment that they were being tested for aggressiveness.
C.The same psychological research indicated that the football and hockey players had a great respect for cooperation and team play, whereas the swimmers were most concerned with excelling as individual competitors.
D.The research studies were designed to include no college athletes who participated in both contact and noncontact sports.
E.Throughout the United States, more incidents of fan violence occur at baseball games than occur at hockey or football games.
第2题
veral hundred ceramic objects, dating back approximately 4,000 years. Although any remnants of a ships wooden frame. would have long ago decayed, the quantity and variety of the ceramics discovered in the initial investigation led the archaeologists to hypothesize that they had discovered an approximately 4, 000-year-old shipwreck. Which of the following, if true, gives the strongest support to the archaeologists hypothesis?
A.Marine archaeologists have discovered a 3, 000-year-old shipwreck in another ancient Mediterranean harbor.
B.The rate at which wood decays when submerged in water varies greatly with the type of wood involved.
C.Two confirmed shipwrecks, approximately 3,500 and 3,000 years old, respectively, have been discovered in the same harbor in which the ceramic objects were discovered.
D.The ceramics discovered in the harbor are similar to ceramics found in several other ancient Mediterranean harbors.
E.Bronze ship"s fittings, approximately 4,000 years old, were discovered on the seabed among the ceramic objects.
第3题
sceptible to that virus increases the plant s resistance to the virus. Because viral diseases account for a significant proportion of crop losses, such genetic alterations, even if carried out on only a modest scale, will significantly reduce crop losses. Each of the following, if true, strengthens the conclusion above EXCEPT:
A.In areas where two successive crops are raised per year, protecting the first crop from a virus will generally protect the second crop from that virus as well.
B.By repeatedly attacking plants that are genetically altered to become virus-resistant, the virus often becomes less lethal to plants that are not genetically altered in that way.
C.Plants that are genetically altered to become virus-resistant often pass virus-resistant genes on to their offspring.
D.Plants that arc made genetically resistant to one kind of virus often acquire resistance to related viral strains as well.
E.Plants that are made genetically resistant to one kind of virus are then more susceptible to infection by unrelated viruses.
第4题
he manufacturing to the service sector of the economy. This shift has occurred, not because of a decline in the production of goods, but because, with applications of new technology, more production of goods can now be achieved with relatively fewer people, and more people are therefore available to satisfy the increased demand for services. Which of the following, if true, provides evidence to support the claim made above that more production of goods can now be achieved with relatively fewer people?
A.Many manufacturing industries in the United States have lost a significant share of their domestic and foreign markets to foreign producers.
B.Services accounted for half of all jobs in the late 1940"s but today account for seventy percent of all jobs.
C.Manufacturing output was one-third higher in 1980 than in 1970, while manufacturing employment grew only five percent during that period.
D.Manufacturing industries, on average, pay a higher per-hour wage and use fewer part-time employees than do service industries.
E.Living standards in states that have shifted to manufacturing economies within the last fifty years are closer to the national average now than in 1940.
第5题
ing antibiotic environments, the presence of resistant bacteria in people could be due to the human use of prescription antibiotics. Some scientists, however, believe that most resistant bacteria in people derive from human consumption of bacterially infected meat. Which of the following statements, if true, would most significantly strengthen the hypothesis of the scientists?
A.Antibiotics are routinely included in livestock feed so that livestock producers can increase the rate of growth of their animals.
B.Most people who develop food poisoning from bacterially infected meat are treated with prescription antibiotics.
C.The incidence of resistant bacteria in people has tended to be much higher in urban areas than in rural areas where meat is of comparable quality.
D.People who have never taken prescription antibiotics are those least likely to develop resistant bacteria.
E.Livestock producers claim that resistant bacteria in animals cannot be transmitted to people through infected meat.
第6题
ve Pironoma when, in fact, they do not; a false negative result indicates that people do not have pironoma when, in fact, they do. To detect pironoma most accurately, physicians should use the laboratory test that has the lowest proportion of false positive results. Which of the following, if true, gives the most support to the recommendation above?
A.The accepted treatment for Pironoma does not have damaging side effects.
B.The laboratory test that has the lowest proportion of false positive results causes the same minor side effects as do the other laboratory tests used to detect Pironoma.
C.In treating Pironoma patients, it is essential to begin treatment as early as possible, since even a week of delay can result in loss of life.
D.The proportion of inconclusive test results is equal for all laboratory tests used to detect Pironoma.
E.All laboratory tests to detect Pironoma have the same proportion of false negative results.
第7题
rs adversely affecting people in the past decade than in previous decades. We can conclude that the planet Earth as a natural environment has become more inhospitable and dangerous, and we should employ the weather and earth sciences to look for causes of this trend. The conclusion drawn above is most seriously weakened if which of the following is true?
A.The weather and earth sciences have provided better early warning systems for natural disasters in the past decade than in previous decades.
B.International relief efforts for victims of natural disasters have been better organized in the past decade than in previous decades.
C.There are records of major earthquakes, volcanic eruptions, droughts, landslides, and floods occurring in the distant past, as well as in the recent past.
D.Population pressures and poverty have forced increasing numbers of people to live in areas prone to natural disasters.
E.There have been no changes in the past decade in people"s land-use practices that could have affected the climate.
第8题
ave cut their employee ranks by more than 3,000 persons. Thus, although deregulated competition has afforded consumers dramatically lower fares, the economy of the United States has been harmed by deregulation of the airlines. The argument above would be most seriously weakened if it were true that
A.a poll of people in the United States expressed exceptionally strong support for airline deregulation.
B.fewer passengers now travel on commercial airlines than traveled on them in 1978, with the consequence that fewer employees are needed to operate the airlines than were needed in 1978.
C.airlines now fly a more restricted regular schedule of routes than they did in 1978, with the consequence that the industry is more highly concentrated and competitive than it was before 1978.
D.several major airlines now enjoy significantly higher profits and levels of employment than they did in the years preceding the Deregulation Act.
E.smaller carriers of passengers have thrived as a result of deregulation and now provide more new jobs than the major airlines have eliminated since 1978.
第9题
ere are who advertise their services , and the lawyers who advertise a specific service usually charge less for that service than lawyers who do not advertise. Therefore, if the state removes any of its current restrictions, such as the one against advertisements that do not specify fee arrangements, overall consumer legal costs will be lower than if the state retains its current restrictions. Which of the following, if true, would most seriously weaken the argument concerning overall consumer legal costs?
A.The state has recently removed some other restrictions that had limited the advertising of legal services.
B.The state is unlikely to remove all of the restrictions that apply solely to the advertising of legal services.
C.Lawyers who do not advertise generally provide legal ser-vices of the same quality as those provided by lawyers who do advertise.
D.Most lawyers who now specify fee arrangements in their advertisements would continue to do so even if the specification were not required.
E.Most lawyers who advertise specific services do not lower their fees for those services when they begin to advertise.
第10题
ats as frightening creatures. The group contends that bats are feared and persecuted solely because they are shy animals that are active only at night. Which of the following, if true, would cast the most serious doubt on the accuracy of the groups contention?
A.Hals are steadily losing natural roosting places such as caves and hollow trees and are thus turning to more developed areas for roosting.
B.Hats are the chief consumers of nocturnal insects and thus can help make their hunting territory more pleasant for humans.
C.Hats are regarded as frightening creatures not only in the United States but also in Europe, Africa, and South America.
D.Raccoons and owls are shy and active only at night; yet they are not generally feared and persecuted.
E.People know more about the behavior. of other greatly feared animal species, such as lions, alligators, and snakes, than they do about the behavior. of bats.
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