新GRE阅读练习题(20)

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新GRE考试阅读理解参考练习

新GRE考试阅读理解参考练习

新GRE考试阅读理解参考练习新GRE考试阅读理解参考练习Our visual perception depends on the reception of energy reflecting or radiating from that which we wish to perceive. If our eyes could receive and measure infinitely delicate sense-data, we could perceive the world with infinite precision. The natural limits of our eyes have, of course, been extended by mechanical instruments; telescopes and microscopes, for example, expand our capabilities greatly. There is, however, an ultimate limit beyond which no instrument can take us; this limit is imposed by our inability to receive sense-data smaller than those conveyed by an individual quantum of energy. Since these quanta are believed to be indivisible packages of energy and so cannot be further refined, we reach a point beyond which further resolution of the world is not possible. It is like a drawing a child might make by sticking indivisible discs of color onto a canvas.We might think that we could avoid this limitation by using quanta with extremely long wavelengths; such quanta would be sufficiently sensitive to convey extremely delicate sense-data. And these quanta would be useful, as long as we only wanted to measure energy, but a completely accurate perception of the world will depend also on the exact measurement of the lengths and positions of what we wish to perceive. For this, quanta of extremely long wavelengths are useless. To measure a length accurately to within a millionth of an inch, we must have a measure graduated in millionths of an inch; a yardstick graduated in inches in useless. Quanta with a wavelength of one inch would be, in a sense, measures that are graduated in inches. Quanta of extremely long wavelength are useless in measuring anythingexcept extremely large dimensions.Despite these difficulties, quanta have important theoretical implications for physics. It used to be supposed that, in the observation of nature, the universe could be divided into two distinct parts, a perceiving subject and a perceived object. In physics, subject and object were supposed to be entirely distinct, so that a description of any part of the universe would be independent of the observer. The quantum theory, however, suggests otherwise, for every observation involves the passage of a complete quantum from the object to the subject, and it now appears that this passage constitutes an important coupling between observer and observed. We can no longer make a sharp division between the two in an effort to observe nature objectively. Such an attempt at objectivity would distort the crucial interrelatioship of observer and observed as parts of a single whole. But, even for scientists, it is only in the world of atoms that this new development makes any appreciable difference in the explanation of observations.1. The primary purpose of the passage is to(A) discuss a problem that hinders precise perception of the world(B) point out the inadequacies of accepted units of measurement(C) criticize attempts to distinguish between perceiving subjects and perceived objects(D) compare and contrast rival scientific hypotheses about how the world should be measured and observed(E) suggest the limited function of sensory observation2. According to the passage, quanta with an extremely long wavelength cannot be used to give complete information aboutthe physical world because they(A) exist independently of sense-data(B) are graduated only in inches(C) have an insignificant amount of energy(D) cannot, with present-day instruments, be isolated from quanta of shorter wavelength(E) provide an insufficiently precise means of measuring length and position3 Which of the following describes a situation most analogous to the situation discussed in lines 9-13?(A) A mathematician can only solve problems the solution of which can be deduced from known axiom.(B) An animal can respond to no command that is more complicated syntactically than any it has previously received.(C) A viewer who has not learned, at least intuitively, the conventions of painting, cannot understand perspective in a drawing.(D) A sensitized film will record no detail on a scale that is smaller than the grain of the film.(E) A shadow cast on a screen by an opaque object will have sharp edge only if the light source is small or very distant.4. The author uses the analogy of the child’s drawing (lines 17-19) primarily in order to(A) illustrate the ultimate limitation in the precision of sense-data conveyed by quanta(B) show the sense of helplessness scientists feel in the face of significant observational problems(C) anticipate the objections of the those scientists who believe that no instrumental aid to observation is entirely reliable(D) exemplify the similarities between packages of energyand varieties of color(E) disparage those scientists who believe that measurement by means of quanta offers an accurate picture of the world5. The author implies that making a sharp division between subject and object in physics is(A) possible in a measurement o obje ct’s length and position, but not in a measurement of its energy(B) still theoretically possible in the small-scale world of atoms and electrons(C) possible in the case of observations involving the passage of a complete quantum(D) no longer an entirely accurate way to describe observation of the universe(E) a goal at which scientists still aim6. The author’s use of the phrase “in a sense” (line 34) implies which of the following?(A) Quanta of extremely long wavelength are essentially graduated in inches.(B) quanta of one-inch wavelength are not precisely analogous to yardsticks graduated in inches.(C) Quanta of extremely long wavelength, in at least on e respect, resemble quanta of shorter wavelength.(D) quanta of on-inch wavelength and quanta of extremely long wavelength do not differ only in their wavelengths.(E) quanta of one-inch wavelength must be measured by different standards than quanta of extremely long wavelength.7. According to the passage, the quantum theory can be distinguished from previous theories of physics by its(A) insistence on scrupulously precise mathematical formulations(B) understanding of the inherent interrelationship of perceiver and perceived(C) recognition of the need for sophisticated instruments of measurement(D) emphasis on small-scale rather than on large-scale phenomena(E) regard for philosophical issues as well as for strictly scientific ones。

GRE考试《阅读理解》练习题及答案(20)

GRE考试《阅读理解》练习题及答案(20)

GRE考试《阅读理解》练习题及答案(20)GRE阅读题目解析:云对地球暖化效应的作用P40As of late 1980s, neither theorists nor large-scale computer climate models could accurately predict whether cloud systems would help or hurt a warming gl obe. Some studies suggested that a four percent increase in stratocumulus cloud s over the ocean could compensate for a doubling in atmospheric carbon dioxide, preventing a potentially disastrous planet-wide temperature increase. On the o ther hand, an increase in cirrus clouds could increase global warming.That clouds represented the weakest element in climate models was illustrat ed by a study of fourteen such models. Comparing climate forecasts for a world with double the current amount of carbon dioxide, researchers found that the mo dels agreed quite well if clouds were not included. But when clouds were incorp orated, a wide range of forecasts was produced. With such discrepancies plaguin g the models, scientists could not easily predict how quickly the world’s clim ate would change, nor could they tell which regions would face dustier droughts or deadlier monsoons.1. The author of the passage is primarily concerned withA. confirming a theoryB. supporting a statementC. presenting new informationD. predicting future discoveriesE. comparing points of view2. It can be inferred that one reason the fourteen models described in the passage failed to agree was thatA. they failed to incorporate the most up-to-date information about the eff ect of clouds on climateB. they were based on faulty information about factors other than clouds th at affect climateC. they were based on different assumptions about the overall effects of cl ouds on climateD. their originators disagreed about the kinds of forecasts the models shou ld provideE. their originators disagreed about the factors other than clouds that sho uld be included in the models3. The information in the passage suggests that scientists would have to an swer which of the following questions in order to predict the effect of clouds on the warming of the globe?A. What kinds of cloud systems will form over the Earth?B. How can cloud systems be encouraged to form over the ocean?C. What are the causes of the projected planetwide temperature increase?D. What proportion of cloud systems are currently composed of cirrus cloud s?E. What proportion of the clouds in the atmosphere form over land masses?P401As of late 1980s, neither theorists nor large-scale computer climate models could accurately predict whether cloud systems would help or hurt a warming gl obe.1980 年代末,无论气象理论学家还是大规模计算机气象模型都无法精确预测,云对地球暖化效应发挥积极或消极作用。

2020年新GRE阅读考试模拟试题及答案

2020年新GRE阅读考试模拟试题及答案

2020年新GRE阅读考试模拟试题及答案2020年新GRE阅读考试模拟试题及答案Many theories have been formulated to explain the role of grazers such as zooplankton in controlling the amount of planktonic algae (phytoplankton)in lakes. The first theories of such grazer control were merely based on observations of negative correlations between algal and zooplankton numbers.A low number of algal cells in the presence of a high number of grazers suggested, but did not prove, that the grazers had removed most of the algae. The converse observation, of the absence of grazers in areas of high phytoplankton concentration, led Hardy to propose his principle of animal exclusion, which hypothesized that phytoplankton produced a repellent that excluded grazers from regions of high phytoplankton concentration. This was the first suggestion of algal defenses against grazing.Perhaps the fact that many of these first studies considered only algae of a size that could be collected in a net (net phytoplankton), a practice that overlooked the smaller phytoplankton (nannoplankton)that we now know grazers are most likely to feed on, led to a de-emphasis of the role of grazers in subsequent research. Increasingly, as in the individual studies of Lund, Round, and Reynolds, researchers began to stress the importance of environmental factors such as temperature, light, and water movements in controlling algal numbers. These environmental factors were amenable to field monitoring and to simulation in the laboratory. Grazing was believed to have some effect on algal numbers, especially after phytoplankton growth rates declined at the end of bloomperiods, but grazing was considered a minor component of models that predicted algal population dynamics.The potential magnitude of grazing pressure on freshwater phytoplankton has only recently been determined empirically. Studies by Hargrave and Geen estimated natural community grazing rates by measuring feeding rates of individual zooplankton species in the laboratory and then computing community grazing rates for field conditions using the known population density of grazers. The high estimates of grazing pressure postulated by these researchers were not fully accepted, however, until the grazing rates of zooplankton were determined directly in the field, by means of new experimental techniques. Using a specially prepared feeding chamber, Haney was able to record zooplankton grazing ratesin natural field conditions. In the periods of peak zooplankton abundance, that is, in the late spring and in the summer, Haney recorded maximum daily community grazing rates, for nutrient-poor lakes and bog lakes, respectively, of 6.6 percent and 114 percent of daily phytoplankton production. Cladocerans had higher grazing rates than copepods, usually accounting for 80 percent of the community grazing rate. These rates varied seasonally, reaching the lowest point in the winter and early spring. Haney’s thorough research provides convincing field evidence that grazers can exert significant pressure on phytoplankton population.20. The author most likely mentions Hardy’s principl e of animal exclusion in order to(A)give an example of one theory about the interaction of grazers and phytoplankton(B)defend the first theory of algal defenses against grazing(C)support the contention that phytoplankton numbers are controlled primarily by environmental factors(D)demonstrate the superiority of laboratory studies of zooplankton feeding rates to other kinds of studies of such rates(E)refute researchers who believed that low numbers of phytoplankton indicated the grazing effect of low numbers of zooplankton21. It can be inferred from the passage that the “first theories” of grazer control mentioned in line 4 would have been more convincing if researchers had been able to(A)observe high phytoplankton numbers under natural lake conditions(B)discover negative correlations between algae and zooplankton numbers from their field research(C)understand the central importance of environmental factors in controlling the growth rates of phytoplankton(D)make verifiable correlations of cause and effect between zooplankton and phytoplankton numbers(E)invent laboratory techniques that would have allowed them to bypass their field research concerning grazer control22. Which of the following, if true, would call into question H ardy’s principle of animal exclusion?(A)Zooplankton are not the only organisms that are affected by phytoplankton repellents.(B)Zooplankton exclusion is unrelated to phytoplankton population density.(C)Zooplankton population density is higher during some parts of the year than during others.(D)Net phytoplankton are more likely to exclude zooplankton than are nannoplankton.(E)Phytoplankton numbers can be strongly affected by environmental factors.23. The author would be likely to aGREe with which of the following statements regarding the pressure of grazers on phytoplankton numbers?I. Grazing pressure can vary according to the individual type of zooplankton.II. Grazing pressure can be lower in nutrient-poor lakes than in bog lakes.III. Grazing tends to exert about the same pressure as does temperature.(A)I only(B)III only(C)I and II only(D)II and III only(E)I, II, and III24. The passage supplies information to indicate that Hargrave and Geen’s conclusion regarding the grazing pressure exerted by zooplankton on phytoplankton numbers was most similar to the conclusion regarding grazing pressure reached by which of the following researchers?(A)Hardy(B)Lund(C)Round(D)Reynolds(E)Haney25. It can be inferred from the passage that one way in which many of the early researchers on grazer control could have improved their data would have been to(A)emphasize the effects of temperature, rather than of light,on phytoplankton(B)disregard nannoplankton in their analysis of phytoplankton numbers(C)collect phytoplankton of all sizes before analyzing the extent of phytoplankton concentration(D)recognize that phytoplankton other than net phytoplankton could be collected in a net(E)understand the crucial significance of net phytoplankton in the diet of zooplankton26. According to the passage, Hargrave and Geen did which of the following in their experiments?(A)They compared the grazing rates of individual zooplankton species in the laboratory with the natural grazing rates of these species.(B)The hypothesized about the population density of grazers in natural habitats by using data concerning the population density of grazers in the laboratory.(C)They estimated the community grazing rates of zooplankton in the laboratory by using data concerning the natural community grazing rates of zooplankton.(D)They estimated the natural community grazing rates of zooplankton by using data concerning the known population density of phytoplankton.(E)They estimated the natural community grazing rates of zooplankton by using laboratory data concerning the grazing rates of individual zooplankton species.27. Which of the following is a true statement about the zooplankton numbers and zooplankton grazing rates observed in Haney’s experiments?(A)While zooplankton numbers began to decline in August,zooplankton grazing rates began to increase.(B)Although zooplankton numbers were high in May, grazing rates did not become high until January.(C)Both zooplankton numbers and grazing rates were higher in December than in November.(D)Both zooplankton numbers and grazing rates were lower in March than in June.(E)Both zooplankton numbers and grazing rates were highest in February.答案 A D B C E C E D。

新GRE逻辑阅读练习题汇总

新GRE逻辑阅读练习题汇总

新GRE逻辑阅读练习题汇总新GRE逻辑阅读练习题Hydrogeology is a science dealing with the properties, distribution, and circulation of water on the surface of the land, in the soil and underlying rocks, and Line in the atmosphere. The term “geohydrology" is 5 sometimes erroneously used as a synonym for "hydrogeology". Geohydrology is concerned with underground water. There are many formations that contain water but are not part of the hydrologic cycle because of geologic changes that have isolated them 10 underground. These systems are properly termed geohydrologic but not hydrogeologic. Only when a system possesses natural or artificial boundaries that associate the water within it with the hydrologic cycle may the entire system properly be termed hydrogeologic. (107 words)1. It can be inferred that which of the following is most likely to be the subject of study by a geohydrologist?(A) Soft, porous rock being worn away by a waterfall(B) Water depositing minerals on the banks of a gorge through which the water runs(C) The trapping of water in a sealed underground rockcavern through the actionof an earthquake(D) Water becoming unfit to drink through the release of pollutants into it from a manufacturing plant(E) The changing course of a river channel as the action of the water wears away the rocks past which the river flows2. The author refers to "many formations" primarily in order to(A) clarify a distinction(B) introduce a subject(C) draw an analogy(D) emphasize a similarity(E) resolve a conflict答案:C/A新GRE逻辑阅读练习题Initially the Vinaver theory that Malory‘s eight romances, once thought to be fundamentally unified. were in fact eight independent works produced both a Line sense of relief and an unpleasant shock. Vinaver‘s 5 th eory comfortably explained away the apparent contradictions of chronology and made each romance independently satisfying. It was, however, disagreeableto find that what had been thought of as one book was now eight books. Part of this response was the natural 10 reaction to the disturbance of set ideas. Nevertheless, even now, after lengthy consideration of the theory‘s refined but legitimate observations, one cannot avoid the conclusion that the eight romances are only one work. It is not quite a matter of disagreeing with the 15 theory of independence, but of rejecting its implications: that the romances may be taken in any or no particular order, that they have no cumulative effect, and that they are as separate as the works of a modern novelist. (154 words)For the following question, consider each of the choices separately and select all that apply5. It can be inferred from the passage that the author believes which of the following about Malory‘sworks?□A There are meaningful links be tween and among the romances.□B The subtleties of the romances are obscured when they are taken as one work.□C Any contradictions in chronology among the romances are less important than their over-all unity.6. The author of the passage concedes which of the following about the Vinaver theory?(A) It gives a clearer understanding of the unity of Malory‘s romances.(B) It demonstrates the irrationality of considering Malory‘s romances to be unified.(C) It establishes acceptab le links between Malory‘s romances and modern novels.(D) It unifies earlier and later theories concerning the chronology of Malory‘s romances.(E) It makes valid and subtle comments about Malory‘s romances.7. Select the sentence in the passage that suggests that, in evaluating the Vinaver theory, some critics were initially biased by previous interpretations of Malory‘s work.答案及解析:第一题选AC做这个题首先要对文章进行剖析。

GRE考试阅读练习试题及答案

GRE考试阅读练习试题及答案

GRE考试阅读练习试题及答案练习一:阅读理解阅读材料在20世纪,科学家们对量子力学的研究揭示了一个令人惊讶的事实:微观世界的物理规律与我们在宏观世界中经验到的完全不同。

在量子世界里,粒子的行为不仅受到它们所在位置的影响,还受到观察者的影响。

这种现象最著名的例子就是“双缝实验”。

在双缝实验中,当粒子如电子通过两个并排的缝隙时,如果你不去观察它们,粒子就会表现出波动性,就像波一样穿过其中一个缝隙。

然而,如果你在实验过程中观察粒子,它们就会表现出粒子性,好像在两个缝隙之间做出了选择。

这个实验不仅挑战了我们对现实的传统理解,也揭示了观察者在量子力学中的重要地位。

这一发现对现代物理学、尤其是量子计算和量子通信等领域的研究产生了深远的影响。

练习题目1. 根据文章,量子力学研究的对象是什么?2. 双缝实验显示了量子粒子的哪种性质?3. 文章中提到的“观察者效应”对量子力学意味着什么?答案1. 量子力学研究的对象是微观世界的物理规律。

2. 双缝实验显示了量子粒子的波动性和粒子性。

3. 观察者效应意味着观察者在量子力学中扮演着重要角色,粒子的行为会受到观察者的影响。

---练习二:逻辑推理阅读材料在过去的几十年里,全球变暖已经成为一个不可忽视的问题。

科学研究表明,人类活动产生的温室气体是导致全球变暖的主要原因。

为了应对这一挑战,许多国家已经开始采取行动,比如提高能源效率,发展可再生能源,以及减少排放。

然而,全球变暖的问题并非仅靠个别国家的努力就能解决。

国际合作是解决这一全球性问题的关键。

只有通过全球合作,我们才能实现足够的减排,以防止全球温度进一步上升。

练习题目1. 全球变暖的主要原因是什么?2. 解决全球变暖问题的关键是什么?答案1. 全球变暖的主要原因是人类活动产生的温室气体。

2. 解决全球变暖问题的关键是国际合作。

---练习三:词汇理解阅读材料在现代社会,信息传播的速度和范围达到了前所未有的高度。

互联网和社交媒体的兴起使得人们可以即时地分享和获取信息。

2020年GRE考试阅读真题及答案

2020年GRE考试阅读真题及答案

2020年GRE考试阅读真题及答案第一篇是中文章,是讲literary personality的。

文章结构是:literary personality对于文学分析的重要性,不同学派的人有不同的看法。

Deconstructionist 认为literary personality不重要,别的一些东西(例如 intertextuality,subtexts,metatexts之类的)才重要。

New historicist 认为literary personality 也不重要,historical context才重要。

但是,对literary detective work(就是推测一本书作者是谁之类的)感兴趣的readers,就觉得 literary personality很重要啦。

这篇文章出了3道题:第一题主旨题。

因为原文仅仅列了多个观点,没有作者观点;讨论的主要对象是literary personality;所以准确选项是:discussing attitudes toward a particular focus for literary analysis.第二题多选题,问Deconstructionist 和New historicist都同意什么。

那肯定选都认为literary personality不重要啦。

于是准确选项只有一个选项:the writer’s literary personality haslittle or no relevance.第三题词汇题,问文中"credit a writer with"是什么意思。

根据这个短语本来的意思和预警,答案是:presume a writer had.第二篇文章:文章结构是:有更多的选择会提升消费者 preference match(偏好被满足) 的期望。

但是实际上,有更多的选择并不会提升消费者实现 preference match 的几率。

2023年GRE英语真题及答案

2023年GRE英语真题及答案

2023年GRE英语真题及答案一、阅读理解阅读理解一题目:The importance of biodiversity答案:Biodiversity is crucial for maintaining ecosystem stability and providing various ecosystem services. It helps regulate climate, support pollination, and purify water.题目:Causes of biodiversity loss答案:Biodiversity loss is primarily caused by habitat destruction, pollution, overexploitation of resources, and climate change.题目:Conservation strategies答案:To mitigate biodiversity loss, conservation strategies include protecting natural habitats, implementing sustainable resource management practices, and reducing pollution.阅读理解二题目:Impacts of global warming答案:Global warming contributes to rising sea levels, more frequent extreme weather events, loss of biodiversity, and negative effects on human health.题目:Causes of global warming答案:Human activities, such as burning fossil fuels, deforestation, and industrial processes, are the main causes of global warming.题目:Mitigation measures答案:To mitigate global warming, measures include transitioning to renewable energy sources, promoting energy efficiency, and implementing policies to reduce greenhouse gas emissions.二、文字推理文字推理一题目:Logical argument答案:A logical argument is a series of statements or facts that lead to a valid conclusion.题目:Elements of a logical argument答案:The elements of a logical argument include premises (supporting statements), evidence (facts or data), and a conclusion (the final statement based on the premises and evidence).文字推理二题目:Cause and effect答案:Cause and effect is a relationship in which one event (the cause) brings about another event (the effect).题目:Identifying cause and effect答案:To identify cause and effect, one must analyze the sequence of events and determine the relationship between them.题目:Example of cause and effect答案:An example of cause and effect is smoking causing lung cancer.三、逻辑推理逻辑推理一题目:Deductive reasoning答案:Deductive reasoning is a logical process in which specific conclusions are drawn from general principles or premises.题目:Syllogism答案:A syllogism is a deductive argument consisting of two premises and a conclusion.逻辑推理二题目:Inductive reasoning答案:Inductive reasoning is a logical process in which general conclusions are drawn from specific observations or evidence.题目:Analogical reasoning答案:Analogical reasoning is a type of inductive reasoning that involves drawing conclusions based on similarities between two or more cases.四、写作写作一题目:The benefits of reading答案:Reading provides numerous benefits, such as expanding knowledge, improving cognitive abilities, enhancing vocabulary, and fostering empathy.题目:Ways to promote reading写作二题目:The impact of social media题目:Concerns about social media答案:Some concerns about social media include privacy issues, cyberbullying, and the influence of fake news.题目:Managing social media use答案:To manage social media use, individuals can set boundaries, critically evaluate information, and engage in responsible online behavior.。

新GRE逻辑阅读练习题

新GRE逻辑阅读练习题

新GRE逻辑阅读练习题我和大家共享一下新GRE规律阅读练习题,快来学习一下吧,下面我就和大家共享,来观赏一下吧。

新GRE规律阅读练习题The belief that art originates in intuitive rather than rational faculties was worked out historically and philosophically in the somewhat wearisome volumes of Benedetto Croce, who is usually considered the originator 5 of a new aesthetic. Croce was, in fact, expressing a very old idea. Long before the Romantics stressed intuition and self-expression, the frenzy of inspiration was regarded as fundamental to art, but philosophers had always assumed it must be controlled by law and by the 10 intellectual power of putting things into harmonious order. This general philosophic concept of art was supported by technical necessities. It was necessary to master certain laws and to use intellect in order to build Gothic cathedrals, or set up the stained glass windows of 15 Chartres. When this bracing element of craftsmanship ceased to dominate artists‘ outlook, new technical elements had to be adopted to maintain the intellectual element in art. Such were linear perspective and anatomy.(156 words)6. The passage suggests that which of the following would most likely have occurred if linear perspective and anatomy had not come toinfluence artistic endeavor?(A) The craftsmanship that shaped Gothic architecture would have continued to dominate artists‘ outlooks.(B) Some other technical elements would have been adopted to discipline artistic inspiration.(C) Intellectual control over artistic inspiration would not have influenced painting as it did architecture.(D) The role of intuitive inspiration would not have remained fundamental to theories of artistic creation.(E) The assumptions of aesthetic philosophers before Croce would have been invalidated.7. Select the sentence in the passage that indicates a traditional assumption of aesthetic philosophers.8. The author mentions “linear perspective and anatomy” in the last sentence in order to do which of the following ?(A) Expand his argument to include painting as well as architecture(B) Indicate his disagreement with Croce‘s theory of the origins of art(C) Support his point that rational order of some kind has often seemed to discipline artistic inspiration(D) Explain the rational elements in Gothic painting that corresponded to craftsmanship in Gothic architecture(E) Show the increasing sophistication of artists after the Gothic period答案:6.B 7.Long before the Romantics stressed 。

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新GRE阅读练习题(20)
Gray wolves have been absent from a large national park for decades. Park officials wish to reestablish the wolves without jeopardizing any existing species of wildlife there. Since the park contains adequate prey for the wolves and since the wolves avoid close contact with people, reintroducing them would serve the officials' purpose without seriously jeopardizing visitors' safety.
Each of the following, if true, strengthens the argument above EXCEPT:
(A) The park is so large that wolves will not need to venture into areas frequented by people.
(B) Rabies is very rare in wolves, and there have been no verified cases of serious human injuries from nonrabid wild wolves since records have been kept.
(C) Ranchers in the region near the park have expressed concern that gray wolves, if reintro-duced, would sometimes prey on their livestock.
(D) Predation by gray wolves on elk in the park is likely to improve the health and viability of the park's elk population as a whole by reducing malnutrition among the elk.
(E) Wolves do not prey on animals of any endangered species that currently inhabit the park.
答案:C。

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