2019年GRE数学真题(最新200题)

G R E数学考试真题与解析-CAL-FENGHAI-(2020YEAR-YICAI)_JINGBIANGRE数学考试真题与解析GRE数学考试真题与解析的内容小编在下文介绍了一部分，更多GRE数学真题小编还会为大家继续分享，敬请关注。

1. 从1,2,3,4,5,6,7,8,9中选出三个数字组成一个三位数,这个三位数的digits中有两个相同,另一个digit与其它两个都不同,问共有多少个这样的三位数?(A) 72(B) 144(C) 180(D) 216(E) 542. 符合 X^2+Y^2<=100的整数解共有多少对?3. A box contains 100 balls, numbered from 1 to 100. If three balls are selected at random and with replacement from the box,what is the probability that the sum of the three numbers on the balls selected from the box will be odd?(A) 1/4(B) 3/8(C) 1/2(D) 5/8(E) 3/44. Right triangle PQR is to be constructed in the xy-plane so that the right angle is at P and PR is parrallel to the x-axis. The x-and y-coordinates of P,Q,and Rare to be integers that satisfy the inequalities -4<=x<=5,6<=y<=16,how many different triangles with these properties could be constructed?(A) 110(B) 1100(C) 9900(D) 10000(E) 121005. (0-9) 要组成三位电话号码,第一位不能是0或1,三位数中相邻两位不能为同一数. (e.g. 227 not acceptable, but 272 acceptable),求可以组成多少个这样的电话号码?参考答案：1.解：因为三个数中两个数相同，所以从9个数中取出两个的可能性为，三个数中那个不同的数和可能位置为3个，取出的两个数哪个做不同的数的可能性为两种2.解：本题的意为一个半径为10的圆中的整数对有多少对。

gre考试数学考试题及答案1.The number of different prime factors of 48The number of different prime factors of 72答案：C2.The number of different positive divisors of 12The number of different positive divisors of 50答案：C3.The number that is as much greater than 63 as it is less than 10184答案：B4. A K-number is a positive integer with the special property that 3 times its units' digit is equal to 2 times its tens' digit.The number of K-numbers between 10 and 993答案：C5.Of the following which is greatest?A.1/2B.7/15C.49/100D.126/250E.1999/4000答案：D6.If n=pqr, where p,q, and r are three different positive prime numbers, how many different positive divisors does n have, including 1 and n?B.5C.6D.7E.8答案：E7.A decrease of 1 in which of the factors above would result in the greatest decrease in the product?A.11B.13C.17D.19E.23答案：A8.Which of the following numbers is not the sum of three consecutive odd integers?A.15B.75C.123D.297E.313答案：E9.A dresser drawer contains 15 garments. If 40 percent of those garments are blouses, how many are not blouses?A.6C.9D.10E.12答案：C10.If a certain company purchased its computer terminals for a total of $540,400 and each of the terminals was purchased for $350, how many terminals did the company purchase?A.1,624B.1,544C.1,434D.1,384E.1,264答案：B。

2019年12月28日大陆地区GRE考试真题回顾数学部分数学1有两个三角形周长分别为52和32，比较这两个三角形的面积大小数学2k是正整数，问149的2k次方和143的2k次方的个位数比较大小数学3H={1, 2, 3, 4}，G={1, 3, 5, 7}，问点(h, g)的个数数学410个正整数，和为101，没有任何一个数超过另一个数的两倍，问：这10个数里面最大的数是多少数学5将20加在这样一个数据的其中一个因数上，这个数据是113×123×135×261×293，问加在哪个因数上会使得最后的结果最大数学6有4个同学选至少2名或以上做project 有多少种组合数学7100到999之间有多少个3位数每个位数的sum是4的数学8在大于100小于1000的整数中随机选出一个数字，求这个数能被7整除的数的概率数学932^19-32 unit digit 是啥Someone needs to import a number of sets of bottles. Each bottle charges $12.04, and it also charges $4.8 for shipping each set (not single bottle but a whole set). The standard deviation of numbers of bottles in each set is 1.5. What is the standard deviation of the prices for each set?数学11事件A发生的概率是0.85，事件B发生的概率是0.9，AB是相互独立事件，问AB都不发生的概率是多少数学12直线方程y=5x+40，x的标准差是4.6，问y的标准差是多少填空部分【所有题目均出自于真经填空机经1250题】填空104-5Give a computer (i)_____ task—winning at chess, say, or predicting the weather—and the machine bests humans nearly every time. Yet when problems are (ii)_____, or require combining varied sources, computers are (iii)_____ human intelligence.填空20-3Historian Barbara Alpern Engel’s task in writing a book about women in Russia must have been a (i)_____ one, because the (ii)_____ the Russian empire’s peoples meant that Russian women could never be treated as a homogeneous group.One of the peculiarities of humans is that we irrationally gravitate to the predictable and avoid risk, whatever the reasons for this _____, it is hardly a sound basis for dealing with complex, long-term problems.A. eccentricityB. predilectionC. vacillationD. proclivityE. waveringF. cowardice填空90-6Part of what currently makes it so (i)_____ to arrive at a scientific understanding of the living world is that while technological advances have produced a cascade of data—from detailed genome sequence to the sophisticated satellite imagery that documents the planet’s ecosystems—our ability to (ii)_____ these data still lags far behind their (iii)_____.填空10-7In establishing that the dust she had observed constitutes two percent of the mass in the quadrant, the astronomer showed that the dust’s extreme visual prominence _____ its relatively minor contribution to the total mass of the region.A. beliesB. masksC. highlightsD. nullifiesF. accentuates填空16-5Despite the scathing precision with which she satirizes the lives of social aspirants and moneyed folk, the writer appears to (i)_____ being part of the world she presents as so (ii)_____.填空40-1The medical professor’s thesis—hardly new, but rarely _____ by a faculty members of his distinction—is that patients are more than the sum of their symptoms and systems.A. discountedB. ignoredC. subvertedD. underestimatedE. espoused填空30-8Tompkinson’s prior donations to the university, while very generous, failed to _____ the magnitude of her latest gift.A. compensate forB. portendC. clarifyD. predictE. offsetF. undermine填空63-9Criticized for decades of overproduction in their signature line of derivative goods, Rectangle Record has satiated the market with a _____ of repackaged old CDs, which interferes with its ability to innovate and produce new albums.A. dearthB. glutC. deficiencyD. surfeitE. abundanceF. profusion填空31-3The genius of the scientific method is that it (i)_____ the dictum of Aristotle that the goal of science is knowledge of the ultimate cause of things. True science, we now know, advances human knowledge by (ii)_____ ultimate causes and focusing instead on the testing of empirical hypotheses.填空118-1The nineteenth-century legislator Robert Barnwell Rhett was known for using language so intemperate that even in an era of considerable political ______, it came almost to occupy a category of its own.A. malfeasanceB. upheavalC. hypocrisyD. invectiveE. retrenchment填空25-10For all the _____ the new CEO has received from the press recently, her staff have adecidedly less rosy view of her.A. encomiumsB. tributesC. evaluationsD. critiquesE. attentionF. publicity填空18-10Although scientific progress leads to constant revision of ideas, one observation that has remained _____ over the years is that there are a lot of insects in the world: some 950,000 species have been identified.A. robustB. significantC. strongD. perplexingE. confoundingF. obscure填空30-2The paleontologist examined the problem afresh, believing that the accepted classification _____ the essential continuity of the specimens by making specious distinctions among them.A. disprovedC. conflatedD. divulgedE. relaxed填空82-4Some academic criticism of popular novels has been (i)_____ in character, being based on the assumption that the wider the appeal, the more (ii)_____ the novel.填空69-3Throughout much of the twentieth century, common scientific sense seemed to dictate that animals could not make a choice based on rational or aesthetic criteria. Such choices were (i)_____ the mental capacity of humans. Scientists who (ii)_____ this animal-human cognitive division were often accused of anthropomorphism.填空46-5Several studies (i)_____ the assumption that paper cups, because they were made of natural products, were more environmentally (ii)_____ than cups made of plastic (polystyrene). Indeed, these studies indicated that the environmental(iii)_____ of producing and recycling paper cups were similar to, if not more than, those related to the production, disposal, and recycling of polystyrene cups.While the Prime Minister’s long-standing reputation for (i)____ practical power may (ii)_____ his recently stated willingness to devolve real power to regional assemblies and local governments, it certainly does not (iii)_____ his doing it.填空59-4According to Dr. Edith Widder, measuring the level of pollutants in sediment provides a more accurate and robust indication of an estuary's health than does measuring the level of chemicals in the water, since pollution in water is (i)_____, but pollution in sediment is (ii)_____.填空32-3Proponents of international regulation of environmental issues have always struggled against scientific uncertainty and economic hostility, two obstacles which, form a political standpoint, often have been closely related, as economic hostility toward environmental regulation for economic reasons have (i)_____ the considerable uncertainty underlying most environmental challenges to (ii)_____ of environmental regulation.填空90-4Hyana Kusiemko and her colleagues speculate that the (i)_____ support among low-income works for increases in the minimum wage is a form of last-place aversion: people who are in a marginally better position than the worst off seek to(ii)_____ to distinguish themselves from those in last place.填空97-7Patterson thought the waste leaking into the river was _____ situation: by contrast, judging from their silence on the matter, the owners of the factory felt the problem did not require immediate action.A. a lingeringB. a convolutedC. a pressingD. an enervatingE. an exigentF. an intricate阅读部分【所有题目均出自于真经阅读机经260篇】阅读-正文Passage 158Sportfishers introduced the Zander, a type of perch, to Britain’s rivers and canals in the 1970s. Because zander eat large numbers of smaller fish, they have had a devastating effect on native fish populations. To protect the native fish, a government program removed a significant proportion of the zander from Britain’s waterways last year. Surprisingly, this year the loss of native fish to zander has been greater than before.阅读-选项passage 1581.Which of the following, if true, would most help to explain the greater effectof zander on the native fish population?A. The climate in Britain is very similar to the climate in regions to which zander are native.B. Most of the zander removed were fully grown, and fully grown zander eat large numbers of smaller zander.C. Every year a large number of zander are caught by sportfisher in Britain’s waterway.D. Previous government programs designed to remove nonnative species from Britain’s waterways have failed.E. Zander are just one of several nonnative fish that prey on the other fish found in Britain’s waterway.阅读-正文Passage 215W.E.B. Du Bois’ exhibit of African American history and culture at the 1900 Paris Exposition Universelle attracted the attention of a world of sociological scholarship whose value his work challenged. Du Bois believed that Spencerian sociologists failed in their attempts to gain greater understanding of human deeds because their work examined not deeds but theories and because they gathered data not to affect social progress but merely to theorize. In his exhibit, Du Bois sought to present cultural artifacts that would shift the focus of sociology from the construction of vast generalizations to the observation of particular, living individual elements of society and the working contributions of individual people to a vast functioning social structure.阅读-选项passage 2151.The passage implies that Du Bois attributed which of the following beliefs to Spencerian sociologists?A. Theorizing is important to the understanding of human actionsB. Vast generalizations have limited value.C. Data gathering is a relatively unimportant part of sociological research.D. Sociology should focus on the living elements of society rather than culturalartifacts.E. Particulars are more important than universals.For the following question, consider each of the choices separately and select all that apply.2.The passage implies that Du Bois believed which of the following statements about sociology?A. It should contribute to the betterment of society.B. It should study what people actually do.C. It should focus on how existing social structures determine individual behavior.阅读-正文Passage 152In February 1848 the people of Paris rose in revolt against the constitutional monarchy of Louis-Philippe. Despite the existence of excellent narrative accounts, the February Days, as this revolt is called, have been largely ignored by social historians of the past two decades. For each of the three other major insurrections in nineteenth-century Paris—July 1830, June 1848, and May 1871—there exists at least a sketch of participants’ backgrounds and an analysis, more or less rigorous, of the reasons for the occurrence of the uprisings. Only in the case of the February Revolution do we lack a useful description of participants that might characterize it in the light of what social history has taught us about the process of revolutionary mobilization.Two reasons for this relative neglect seem obvious. First, the insurrection of February has been overshadowed by that of June. The February Revolution overthrew a regime, to be sure, but met with so little resistance that it failed to generate any real sense of historical drama. Its successor, on the other hand, appeared to pit key socioeconomic groups in a life-or-death struggle and was widely seen by contemporary observers as marking a historical departure. Through their interpretations, which exert a continuing influence on our understanding of the revolutionary process, the impact of the events of June has been magnified, while, as an unintended consequence, the significance of the February insurrection has been diminished. Second, like other “successful” insurrections, the events of February failed to generate the most desirable kinds of historical records. Although the June insurrection of 1848 and the Paris Commune of 1871 would be considered watersheds of nineteenth-century French history by any standard, they also presentthe social historian with a signal advantage: these failed insurrections created a mass of invaluable documentation as a by-product of authorities’ efforts to search out and punish the rebels.Quite different is the outcome of successful insurrections like those of July 1830 and February 1848. Experiences are retold, but participants typically resume their daily routines without ever recording their activities. Those who played salient roles may become the objects of highly embellished verbal accounts or in rare cases, of celebratory articles in contemporary periodicals. And it is true that the publicly acknowledged leaders of an uprising frequently write memoirs. However, such documents are likely to be highly unreliable, unrepresentative, and unsystematically preserved, especially when compared to the detailed judicial dossiers prepared for everyone arrested following a failed insurrection.As a consequence, it may prove difficult or impossible to establish for a successful revolution a comprehensive and trustworthy picture of those who participated, or to answer even the most basic questions one might pose concerning the social origins of the insurgents.阅读-选项passage 1521.With which of the following statements regarding revolution would the author most likely agree?A. Revolutionary mobilization requires a great deal of planning by people representing disaffected groups.B. The objectives of the February Revolution were more radical than those of the June insurrection.C. The process of revolutionary mobilization varies greatly from one revolution to the next.D. Revolutions vary greatly in the usefulness of the historical records that they produce.E. As knowledge of the February Revolution increases, chances are good that its importance will eventually eclipse that of the June insurrection.2.Which of the following is the most logical objection to the claim made in the last paragraph?A. The February Revolution of 1848 is much less significant than the Julyinsurrection of 1830.B. The backgrounds and motivations of participants in the July insurrection of 1830 have been identified, however cursorily.C. Even less is known about the July insurrection of 1830 than about the February Revolution of 1848.D. Historical records made during the July insurrection of 1830 are less reliable than those made during the May insurrection of 1871.E. The importance of the July insurrection of 1830 has been magnified at the expense of the significance of the February Revolution of 1848.3.The purpose of the second paragraph is to explain whyA. the people of Paris revolted in February 1848 against the rule of Louis-PhilippeB. there exist excellent narrative accounts of the February DaysC. the February Revolution met with little resistanceD. a useful description of the participants in the February Revolution is lackingE. the February Revolution failed to generate any real sense of historical drama4.It can be inferred from the passage that the author considers which of the following essential for understanding a revolutionary mobilization?A. a comprehensive theory of revolution that can be applied to the major insurrections of the nineteenth centuryB. awareness of the events necessary for a revolution to be successfulC. access to narratives and memoirs written by eyewitnesses of a given revolutionD. the historical perspective provided by the passage of a considerable amount of timeE. knowledge of the socioeconomic backgrounds of a revolution’s participants阅读-正文Passage 112Whereas Carlos Bulosan aimed through fiction and personal testimony to advance both Filipino civil rights in the United States and the social transformation of the Philippines, Yen Le Espiritu has set herself the task of recovering life histories of Filipino Americans. Her work brings Filipino Americans of the generation following the 1934-1965 immigration hiatus graphically to life. A special strength is the representation of Filipino American women, who were scarce among immigrants before the 1934 American curb on Filipino immigration but composed more than half of the immigrants to America since liberalization in 1965. Espiritu’s subjects document their changing sense of Filipino identity in the United States, much as Bulosan did as a member of the first substantial wave of immigrants.阅读-选项passage 1121.According to the passage, both Bulosan and Espiritu do which of the following in their work?A. consider generational differences in Filipino immigrants’ responses to life in the United StatesB. attempt to make allowance for the demographic variations among Filipino immigrants to the United StatesC. employ fiction in addition to documenting actual life histories of Filipino immigrants to the United StatesD. represent how life in the United States has affected immigrants’ sense of Filipino identityE. examine the effects on Filipinos in the United States of the 1934 American curb on Filipino immigration2.In the context in which it appears, “graphically” most nearly meansA. in writingB. by means of drawingC. impressionisticallyD. diagrammaticallyE. vividly阅读-正文Passage 130Some archaeologists speculate that the Americas might have been initially colonized between 40,000 and 25,000 years ago. However, to support this theory it is necessary to explain the absence of generally accepted habitation sites for that time interval in what is now the United States. Australia, which has a smaller land area than the United States, has many such sites, supporting the generally accepted claim that the continent was colonized by humans at least 40,000 years ago. Australia is less densely populated (resulting in lower chances of discovering sites) and with its overall greater aridity would have presented conditions less favorable for hunter-gatherer occupation. Proportionally, at least as much land area has been lost from the coastal regions of Australia because of postglacial sea-level rise as in the United States, so any coastal archaeological record in Australia should have been depleted about as much as a coastal record in the United States. Since there are so many resource-rich rivers leading inland from the United States coastlines, it seems implausible that a growing population of humans would have confined itself to coasts for thousands of years. If inhabitants were present 25,000 years ago, the chances of their appearing in the archaeological record would seem to be greater than for Australia.阅读-选项passage 1301.The passage is primarily concerned with doing which of the following?A. presenting an objection to a claimB. accounting for an apparent anomalyC. outlining an alternative interpretationD. correcting a particular misconceptionE. questioning the validity of a comparison2.The author of the passage implies which of the following about 25,000 years ago?A. The coastline of the region that is now the United States is longer than it was 40,000 years ago.B. Rivers in what is now the United States were numerous than they are now.C. Australia was less densely populated at that time than was the region that is now the United States.D. Australia’s climate was significantly drier than it is now.E. Global sea level was lower than it is now.3.The author of the passage implies that, in what is now the United States, archaeological evidence of inhabitation in the period from 40,000 to 25,000 years ago is lacking because that regionA. had its oldest habitation sites inundated following a postglacial rise in sea level.B. has many resource-rich rivers that facilitated the dispersal of early inhabitants from an initial concentration in coastal areas.C. was sparsely populated until about 25,000 years ago.D. was colonized less than 25,000 years ago.E. was inhabited only by hunter-gatherers until 25,000 years ago.阅读-正文Passage 106Although vastly popular during its time, much nineteenth-century women’s fiction in the United States went unread by the twentieth-century educated elite, who were taught to ignore it as didactic. However, American literature has a tradition of didacticism going back to its Puritan roots, shifting over time from sermons and poetic transcripts into novels, which proved to be perfect vehicles for conveying social values.In the nineteenth century, critics reviled Poe for neglecting to conclude his stories with pithy moral tags, while Longfellow was canonized for his didactic verse.Although rhetorical changes favoring the anti-didactic can be detected as nineteenth-century American transformed itself into a secular society, it was twentieth-century criticism, which placed aesthetic value above everything else, that had no place in its doctrine for the didacticism of others.阅读-选项passage1061.Which of the following best describes the function of the highlighted sentence?A. It explains why the fiction mentioned in the first sentence was not popular in the twentieth century.B. It assists in drawing a contrast between nineteenth-century and twentieth-century critics.C. It provides an example of how twentieth – century readers were taught to ignore certain literature.D. It questions the usefulness of a particular distinction between Poe and Longfellow made by critics.E. It explains why Poe’s stories were more popular than Longfellow’s verse during the nineteenth century.2.In the context in which it appears, “conveying” most nearly meansA. carryingB. transferringC. grantingD. impartingE. projecting阅读-正文Passage 131Animals live longer when their calorie intake is restricted to two-thirds of what is considered normal for their species. Animals so restricted are also generally healthier: most disease, including cancer, diabetes, and neurodegenerative illness, are forestalled.This phenomenon was long attributed to a simple slowing of metabolism(cells’ production of energy from fuel molecules) and consequent reproduction of its toxic by-products in response to less food. In fact, however, calorie restriction does not slow mammalian metabolism, and in yeast and worms, metabolism is both sped up and altered.Some scientists now theorize that calorie restriction is a biological stressor that, like natural food scarcity, induces a more complex defensive response, which in mammals includes changes in cellular defenses and repair.阅读-选项Passage 1311.In the passage, the function of the highlighted portion (in yeast… and altered) is toA. provide specific examples of organisms whose longevity does not increase in response to calorie restriction.B. illustrate the probable means by which organisms placed on a calorie-restriction diet compensate for the reduction in available food-based level.C. suggest the mechanism that is responsible for prolonging the life of organism whose calorie intake is significantly reduced.D. give an example that explain why scientists’ thinking about the physiological effects of calorie restriction changed.E. distinguish the different ways that mammalian and non-mammalian metabolisms respond to significant reductions in calorie intakeConsider each of the choices separately and select all that apply.2.The passage implies which of the following about the explanation mentioned in the highlighted text (This phenomenon… of metabolism)?A. There are empirical findings that conflict with a presumption of the explanation.B. The explanation predicts that the effect of calorie restriction on longevity will be the greatest for the species with the highest rate of metabolism.C. The explanation predicts that the effects of calorie restriction will be uniformly positive.阅读-正文Passage 25Modern feminism has brought the reputation of the English writer Mary Wollstonecraft (1759-1797) to something approaching the luster it deserves. While she enjoyed a certain celebrity among political radicals in the years just after her death, beginning in the nineteenth century her fame as a writer was hidden by disproportionate attention to her unconventional and, at the time, shocking personal life. When, therefore, Virginia Woolf wrote in 1925 of Wollstonecraft’s A Vindication of the Rights of Men and A Vindication of the Rights of Woman that they felt like books so true that they seem now to contain nothing new in them, it was more a wishful than an accurate statement of the case. Wollstonecraft’s advances in moral thinking still have the power to shock position-takers of every party. The importance of gender even today is said to cut across other criteria for judging the conduct of men and women in society; Wollstonecraft, by contrast, believed that the sharedmorality of men and women should cut across all specifications of gender.Wollstonecraft considered gender-based morality a relic of a barbarous age: part of that specialization of virtues by which every sexual feeling was expected to express itself as libertinism (in men) or false modesty (in women). In her view, there ought to be one criterion of morals for men and women alike, with both sexes cultivating the same virtues. Wollstonecraft rebelled against the copious sentimental literature of her own time, which she felt patronized women by insisting that it was to their advantage to affect chastity and modesty and that such virtues were their own reward.In The Rights of Men, Wollstonecraft explores this double Bulosan standard from an unexpected angle. It was the first major response to Edmund Burke’s Reflections on the Revolution in France (1790), appearing less than a month after the impassioned defense of the deposed French monarchy.A defender of Burke called Wollstonecraft’s book an incoherent mass of treacherous candour, interested generosity, and, if not false, at least unnecessary accusation.But Wollstonecraft nonetheless managed to show how the traditionally feminine virtues of sentimental morality had been transferred by Burke to the aristocracy. Burke’s rhapsody on the queen of France (glittering like the morning star, full of life, and splendor, and joy) was, for Wollstonecraft, an example of the argument that beauty and instinct must often prevail over reason, the argument on which Burke took his stand as a defender of the old order. Like women, Burke thought, and from a similar greatness and delicacy in their nature, the aristocracy were understood at once to require deference and to solicit compassion. To Wollstonecraft, Burke’s argument linked sympathy and power in a dangerous alliance; she insisted that aristocrats do not deserve to be treated in the way that women have traditionally been treated any more than women themselves do.阅读-选项Passage 251.By quoting Burke’s defender in the highlighted phrase, the author of the passage most clearly succeeds inA. providing a context for the political turbulence that unseated the French monarchyB. emphasizing the way in which Wollstonecraft’s philosophy divided men and womenC. explaining why Wollstonecraft’s work has won more acceptance in the twentieth century than in the nineteenthD. illustrating the nature of the appeal of Burkes argumentE. demonstrating the degree of hostility aroused by Wollstonecraft’s work2.The author of the passage quotes Burke’s description of the queen of France most probably in order toA. provide a specific illustration of a position with which Wollstonecraft took issueB. provide a specific example of Burke’s already archaic prose styleC. balance the quotation from Burkes anonymous defenderD. provide evidence of why Burkes position was more widely accepted than Wollstonecraft’sE. provide an example of what Wollstonecraft perceived as Burke’s lack of political astuteness3.The passage suggests that which of the following is true concerning Virginia Woolf’s appraisal of A Vindication of the Rights of Men and A Vindication of the Rights of Woman?A. Woolf was defending Wollstonecraft’s theories against attacks by nineteenth—century critics who concentrated only on Wollstonecraft’s notoriety.B. Woolf favored the advances proposed by Wollstonecraft and mistakenly assumed that they had become self-evident in the twentieth century.C. Woolf miscalculated the practical effects that the advances proposed by Wollstonecraft would have on society.D. Woolf decried the loss in the twentieth-century of social progress made in the eighteenth and nineteenth centuries.E. Woolf was reacting against what she considered a lack of originality on Wollstonecraft’s part while calling for more sweeping changes than Wollstonecraft had proposed.4.The author of the passage suggests that modern feminism has treated the writings of Mary Wollstonecraft in which of the following ways?A. Modern feminism has emphasized the progressive aspects of Wollstonecraft’s writings, while separating her work from her personal reputation.。

——参考范本——【资格考试】2019最新整理-GRE数学总结______年______月______日____________________部门数学的正确率是无比重要的,做题时间是无比次要的——abott3,6日最新几经:1、就记得一道,也是俺自己做错了的,说什么20xx条鱼平均重为18.6,65%在1个方差内,8?%在2个方差内,方差为6,问在6.6-12.6之间的占多少?现在想就是问在1-2个方差内在占多少,8?%-65%再除以2?不确定.2、〈X〈1 12x为整数，问tens digit of x与0比较大小。

（不知道tens digit是什么意思，小数点后第一位？选了不能确定）3、还考了某x完成某一任务需a天(具体数忘了），Y需要y天,两人一起需要b天（b为具体数），问y的数值。

后面还有一道也是同样意思，只是改成机器x和机器y ,偶只记得一个答案是36，一个是24（sure)4、图表提一个为柱形题.说美国卫生方面消费比例的.有NURSING和PRESCRIPTION的.看完题目再回表中找元素即可。

5、另一个为曲线提，讲天气(还是台风?)预报正确的比例和预报中错误的比例.两提一个选30,一个选50%.(我很ENJOY 做数学部分,有意慢慢拿ETS杀费苦心CRAFT的弱智提消遣, 所以还记得几提.)6、还有定义M为A的倒数和B的倒数的算术平均值的倒数,求M .好象答案是57.57、数列an=(n+2)/n 4/2*5/3*6/4*7/5*……*(y+2)/y=12, 求y值。

答案应是7。

8、求表面积为150y2的立方体的体积，与125y3比较。

答案是相等。

9、共140人参加会议，第一次参加80%，第二次参加124人，问两次都参加的人数，与104比较。

答案应为不确定。

10、由所有1、2、3、6、7五个数字组成的五位偶数的个数。

答案应是48。

11、一矩形长8feet,宽4feet，现在一边截去一长8feet,宽x的长条，之后在垂直方向截去宽x的一条。

——参考范本——【资格考试】2019最新整理-阿成的GRE数学总结（12______年______月______日____________________部门阿成在水妖的基础的终结有的题目需自己甄别！！！~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~一．算术：1．A、B两事件独立。

A、B同时发生的机率为0.3，A单独发生的机率为0.5，问发生B的机率与0.5比大小。

key：A发生的概率为0.5+0.3=0.8；(AB)=0.3=P(A)*P(B)=0.8*P(B)(因为 A.B对立) 所以P(B)=0.375<0.5。

解：因为A单独发生的机率为0.5并不包括AB同时发生的情况，所以A发生的概率应该是：A单独发生和AB同时发生概率之和即P(A)=0.5+0.3=0.8P(A)*P(B)=P(AB)。

P(B)=P(AB)/P(A)=0.3/0.8=0.3752．A出现的概率是0.6 ， B 出现 0.8, 问A or b or both.出现的概率与 0.92比较大小。

解：~P(A)=1-0.6=0.4 ~P（B）=1-0.8=0.2 ~a*b=0.2*0.4=0.08 1-0.08=0.92所以是C.3．从320人中挑一人，挑中女生的概率是0.65，问这群人里女比男多的数和100比大小。

解：因为只挑一人，所以此题的概率其实就是百分比：男女生人数差异为320*（0.65-0.35）=96 所以100大，选B4．从 1到100 选两个不同的数，两者皆为 6 的倍数的机率？（注意！是两个不同的数！）解：100里共有6的倍数的个数100/6=16余4，则共有16个C（2 16）/C（2 100）=4/165=2.42%5．五个球，两个红、三个蓝，随机取两个，至少一个为蓝的概率。

解：1-C（2 2）/ C （2 5）=1-1/10=9/10附：至少一个为红的概率：1-C（2 3）/C （2 5）=1-3/10=7/106．从STAR和AMSS中各选一个letter，它们相同的概率。

GRE考试数学部分真题汇编在GRE考试的数学部分，你将会面对各种各样的数学问题和真题。

这些题目旨在考察你对基本数学概念和解题方法的理解和应用能力。

为了帮助你更好地准备数学部分，下面是一些GRE数学部分的真题汇编，供你练习和参考。

1. 问题描述：在一个矩形房间中，地板被铺上了方形瓷砖，每块瓷砖的边长为1英尺。

如果房间的长度是15英尺，宽度是10英尺，那么需要多少块砖来铺满整个房间？解题思路：矩形房间的面积等于瓷砖的总面积。

通过计算可知，房间的面积为15英尺乘以10英尺，等于150平方英尺。

而每块瓷砖的面积为1平方英尺，所以需要150块瓷砖来铺满整个房间。

2. 问题描述：某家电商在一次促销活动中，将一台原价200美元的电脑打折出售，折扣幅度为20%。

这台电脑的促销价是多少美元？解题思路：首先，计算折扣金额，即200美元乘以20%。

将200乘以0.2，得到40美元。

然后，将原价200美元减去折扣金额40美元，得到促销价为160美元。

3. 问题描述：一名体育运动员在一次跳高比赛中，首次跳高1.5米未能成功。

随后，他每次都比前一次跳高的高度多0.2米。

他第5次成功跳高后，跳高的高度是多少米？解题思路：根据题意，运动员每次跳高的高度为1.5米加上前一次跳高的高度增加值。

所以，第2次跳高高度为1.5米加上0.2米，第3次跳高高度为1.7米加上0.2米，以此类推。

根据题意，可以得知第5次跳高高度是1.5米加上4个0.2米的和，等于1.5米加上0.2米乘以4，等于1.5米加上0.8米，结果为2.3米。

4. 问题描述：某公司的年度销售额为1000万美元，其中70%来自国内市场，30%来自国际市场。

如果公司在国际市场上的年度销售额是多少美元？解题思路：根据题意，国际市场销售额占年度销售额的30%。

将1000万美元乘以30%，得到国际市场的年度销售额为300万美元。

以上是一些GRE数学部分的真题汇编，通过解答这些真题，你可以提高自己的数学解题能力和思维灵活性。

gre考试数学真题试卷GRE考试数学真题试卷一、选择题（每题1分，共20分）1. If the function f(x) = 3x^2 - 2x + 1, what is the value of f(1)?A. 0B. 2C. 3D. 4E. 52. What is the derivative of the function g(x) = 4x^3 - x^2 + 7?A. 12x^2 - 2xB. 12x^2 + 2xC. 12x^3 - 2xD. 12x^3 + 2xE. 12x^3 - 2x^23. The area under the curve of y = x^2 from x = 0 to x = 2 is:A. 2B. 4C. 8D. 10E. 124. If a and b are the roots of the quadratic equation x^2 +5x + 6 = 0, what is the value of a + b?A. -3B. -2C. -1D. 0E. 15. The slope of the line passing through the points (2, 3) and (4, 7) is:A. 1B. 2C. 3D. 4E. 56. What is the value of sin(30°)?A. 1/2B. √2/2C. √3/2D. 2/√3E. 1/√27. The integral of the function h(x) = 3x + 2 is:A. x^3 + 2x + CB. x^3 + 2x^2 + CC. x^2 + 2x + CD. 3x^2 + 2x + CE. 3x^2 + 2x^3 + C8. The equation of a circle with center (3, 4) and radius 5 is:A. (x - 3)^2 + (y - 4)^2 = 25B. (x - 3)^2 + (y - 4)^2 = 1C. (x - 3)^2 + (y - 4)^2 = 100D. (x - 3)^2 + (y - 4)^2 = 625E. (x - 3)^2 + (y - 4)^2 = 09. The volume of a sphere with radius 4 is:A. 256πB. 512πC. 1024πD. 2048πE. 4096π10. If the sequence 2, 6, 18, 54, ... is a geometric sequence, what is the common ratio?A. 2B. 3C. 4D. 5E. 6二、填空题（每题2分，共20分）11. If the sum of the first n terms of an arithmetic sequence is given by S_n = n^2, then the 5th term of the sequence is__________.12. The equation of the line perpendicular to y = 2x - 1 and passing through the point (1, 3) is __________.13. The value of the definite integral ∫(0 to 1) x^2 dx is__________.14. If the function f(x) = sin(x) + cos(x), then f''(x) is__________.15. The area of a triangle with vertices at (0,0), (3,0), and (0,4) is __________.16. The limit of the function (1 + 1/n)^n as n approaches infinity is __________.17. The value of e^(iπ) is __________.18. The standard deviation of the data set {2, 4, 6, 8, 10} is __________.19. If a fair coin is tossed 5 times, the probability of getting exactly 3 heads is __________.20. The value of the binomial coefficient C(n, k) when。

gre数学练习题及答案1. 集合问题：设集合A={1, 2, 3}，集合B={2, 3, 4}，求A∩B（A 与B的交集）。

2. 概率问题：一个袋子里有5个红球和3个蓝球，随机抽取一个球，抽到红球的概率是多少？3. 几何问题：一个直角三角形的两条直角边长分别为3和4，求斜边的长度。

4. 函数问题：给定函数f(x) = 2x + 3，求f(-1)的值。

5. 统计问题：一组数据的平均数是5，中位数是6，众数是7，求这组数据可能的值。

6. 百分比问题：如果一个商品的价格从100元上涨到120元，求价格上涨的百分比。

7. 代数问题：解方程2x - 3 = 7。

8. 面积问题：一个矩形的长是10厘米，宽是5厘米，求这个矩形的面积。

9. 速度问题：如果一个人以每小时5公里的速度行走，他需要多少时间才能走完20公里的距离。

10. 比率问题：如果3个苹果的重量等于2个橙子的重量，且一个苹果的重量是150克，求一个橙子的重量。

答案：1. A∩B = {2, 3}。

2. 概率 = 红球数量 / 总球数 = 5/8。

3. 斜边长度= √(3² + 4²) = √(9 + 16) = √25 = 5。

4. f(-1) = 2(-1) + 3 = -2 + 3 = 1。

5. 数据可能为：7, 7, 6, 5, 4, 3, 2, 1（满足平均数、中位数和众数的条件）。

6. 上涨百分比 = (新价格 - 原价格) / 原价格× 100% = (120 - 100) / 100 × 100% = 20%。

7. 2x - 3 = 7，解得 x = 5。

8. 面积 = 长× 宽= 10 × 5 = 50平方厘米。

9. 时间 = 距离 / 速度 = 20 / 5 = 4小时。

10. 3个苹果 = 2个橙子，即3 × 150克= 2 × 橙子重量，解得橙子重量 = 225克。

2019年新GRE数学11道练习题及答案解析1：还有数列题：a1=2，a2=6，an=an-1/an-2，求a150.解答： an=an-1/an-2,所以an-1=an-2/an-3,带入前式得an=1/an-3,然后再拆一遍得到an=an-6,也就是说,这个数列是以6为周期的,则a150=a144=...=a6,利用a1,a2能够计算出a6=1/3.如果实在想不到这个方法,能够写几项看看很快就会发现a150=a144,大胆推测该数列是以6为周期得,然后写出a1-a13(也就是写到你能看出来规律),不难发现a6=a12,a7=a13,然后那,稍微数数,就能够知道a150=a6了,同样计算得1/3.2：问摄氏升高30度华氏升高的度数与62比大小.key：F=30*9/5=54Myanswer：加起来=695：24，36，90，100四个数中,该数除以它的所有的质因子，最后的结果是质数的是那个：Key：906：0.123456789101112….，这个小数无限不循环地把所有整数都列出来.请问小数点后第100位的数字是多少?Key：位数0 1 2 3 4 5 6 7 8 9 1010 11 12 ………………………19 2020 21……………………………29 2030……………………………… 39 2040……………………………… 49 2050 51 52 53 54 55 56 ――――――第101位 =5??7：2904x=y2(y的平方)，x、y都是正整数，求x的最小值。

因为：X^2×Y^2×Z^2=(X×Y×Z)^2所以把2904除呀除=2×2×2×3×11×11=2^2×11^2×6再乘一个6就OK了2^2×11^2×6×6=(2×11×6)^2=132^2Key：最小的x=68：序列An=1/n-1/(n+1),n>=1,问前100项和.解答：An =1/n-1/(n+1)An-1=1/(n-1)-1/nAn-2=1/(n-2)-/(n-1)A1=1-1/2把左边加起来就是An+An-1+……+A1=1-1/(n+1) ...消掉了好多好多项之后的结果Key：把n=100带入得前100项之和为100/1019：等腰三角形，腰为6.底边上的高为x,底边为y,问4x2+y2和144谁大解答：勾股定理得(y/2)2+x2=62,所以4x2+y2=14410：-1Key：我想的办法只能是尝试：原式=r(1+t*t)恒小于零1)r -1， t 0 则原式 -12)r -1， t -1则原式 -23)r 0 ， t 0 则原式 0例如：r=-0.9 t=-1/3 时,原式=-1,若此时-0.9-1.11：有长方形4feet*8feet,长宽各截去x inch,长宽比2：5，解答：列出方程4*12-x)/(8*12-x)=2/5 => x=16。

GRE考试数学部分试题库及答案GRE（研究生入学考试）是全球范围内广泛接受且广泛使用的标准化考试之一，用于评估申请者在数学、阅读和写作等领域的能力。

数学部分是GRE考试的核心部分之一，它旨在测试考生的数学推理能力和解决实际问题的能力。

为了帮助考生更好地准备数学部分，以下是一些GRE数学部分的试题库及答案：1. 题目：如果x + 4 = 8，那么x的值是多少？答案：x = 42. 题目：如果12x = 36，那么x的值是多少？答案：x = 33. 题目：A、B、C三个人一起完成一项工作，A单独完成该工作需要5小时，B单独完成需要8小时，C单独完成需要10小时。

如果他们三个人一起工作，那么完成该工作需要多少小时？答案：A、B、C三个人一起工作的效率为1/5 + 1/8 + 1/10 = 37/40。

完成整个工作需要的时间为1 / (37/40) = 40/37小时。

4. 题目：本金为P的债券到期后，变为金额为A的债券，经过了n 年。

如果利率为r，那么本金P可以用以下公式计算：P = A / (1 + r)^n。

如果一笔本金为$5000的债券到期后变为$6500的债券，经过了5年，且利率为4%，那么最初的本金P是多少？答案：P = 6500 / (1 + 0.04)^5 = $5654.975. 题目：已知两条直线的斜率分别为m1和m2，那么这两条直线的夹角θ可以通过以下公式计算：θ = arctan((m2 - m1) / (1 + m1 * m2))。

如果直线1的斜率m1为1/2，直线2的斜率m2为2/3，那么这两条直线的夹角θ是多少？答案：θ = arctan((2/3 - 1/2) / (1 + 1/2 * 2/3)) = arctan(1/7) ≈ 8.13°以上是一些GRE数学部分试题库及答案的示例。

考生们可以通过解题练习和模拟考试来提高数学推理和解题能力，从而在GRE数学部分取得良好的成绩。

2019年12月20日大陆地区GRE考试真题（考生回忆版）数学部分数学 1k是正整数，问k平方-k的余数和1比较大小关系数学 2有一个委员会，6个professor3个manager4个coordinator，要求组成一个5人的小组。

要求profeesor中的Dr.W和 manager中的Ms.M都要在有多少种办法数学 3P和N都是质数，P-N=4，P除以N小于2大于2/3，问p的值是多少数学 42≤r＜s≤6，r和s都是整数，问(r+s)/rs的最大值是多少数学 5小区每天送104份报纸，其中要3份报纸的家庭数量是要1份报纸的家庭数量的2倍，要2份报纸的家庭数量是要1份报纸家庭数量的3倍，问要2份报纸的家庭数量是多少数学 6F club有20000人，M club 30000人，加一起的membership是45000，问从F club里选一个人，他同时有M club membership的概率是多少数学72的32次方除以3的余数是多少数学8一共80名学生，physical club 60 人，chemistry club 50 人，biography 35人，每个学生至少参加一个俱乐部，没有学生三个都参加，以下哪个可能是既参加biography 又参加chemistry的学生数目？A. 0B. 5C. 10D. 15E. 20F. 25G. 30H. 35数学9一个三位数，每个数位上可以选择的有12345，不能重复，问这个三位数有多少种可能性数学10玩游戏，可以拿2point或4point，小明的average是3.8，问拿2分的次数的9倍，和拿4分的次数的大小关系数学114个不同的玩具分给3个不同的小孩，每个小孩都至少有一个礼物，每个玩具也必须分给小孩，求一共有多少种不同的分法数学12每层N本书，一共S层，然后把最上面一层的数平均分配到其他层，问分完之后每层有多少本书填空部分【所有题目均出自于真经填空机经1250题】填空100-1The professor’s tendency to commandeer faculty meetings to promote her personal agenda quickly inspired resentment among other faculty, who objected to such _____.A. appropriationB. obfuscationC. cavilingD. vacillationE. cronyism填空65-6Industry-sponsored scientific research on chemical safety often (i)_____. Media reports regularly imply that industry support of scientific work is alone sufficient to (ii)_____ that research. Even though the source of funding has been determined to be a less significant cause of bias than other factors, industry support suffices, in the minds of many people, to (iii)_____ the credibility of scientific work.填空5-9Although one can adduce myriad of examples of ecosystem disruption by nonindigenousspecies, nevertheless most introduced species that survive in fact appear to have quite _____ effects on the ecosystem they have invaded.A. minimalB. triflingC. markedD. conspicuousE. intriguingF. deleterious填空20-3Historian Barbara Alpern Engel’s task in writing a book about women in Russia must have been a (i)_____ one, because the (ii)_____ the Russian empire’s peoplesmeant that Russian women could never be treated as a homogeneous group.填空81-6Filler claims that after the social welfare programs of the 1960s, belief that the government has an obligation to provide decent housing for citizens who cannot afford it was (i)_____ in the United States by the notion that providing suitable shelter for everyone should be (ii)_____. Thus today in the (iii)_____ oftaxpayer-sponsored initiatives we have volunteer home-construction programs, honorable in intent but pitifully limited in scope.填空11-7Changes made to ecosystem in order to achieve a goal, such as food production or flood control, often _____ significant unforeseen trade-offs between other important products and service the ecosystems provide.A. predictB. delayC. foretellD. obscureE. yieldF. engender填空38-3Convinced of the gravity of her poetry, Voigt must have found the reviews of her most recent collection (i)_____ reading: one amused reviewer thought that it was unrecognizable as poetry but decidedly (ii)_____.填空48-3The description of humans as having an internal clock is not a (i)_____. Or rather, it is—you do not have a tiny watch in your cerebellum—but it also refers to (ii)_____, a specialized bundle of cells that regulates cyclical processes.填空38-4The author’s best-selling book on Virginia Woolf is not (i)_____ treatment of her subject; on the contrary, it presents (ii)_____ portrait of the novelist, faults and all.填空 88-9The life of a secret agent is dangerous enough, but the life of a double agent is infinitely more ______: a single slip can send an agent crashing to destruction.A. arduousB. precariousC. clandestineD. perilousE. covertF. exhilarating填空3-4Many of the towns that have voted to keep incinerators in the county’s solid waste plan have done so not because they necessarily (i)_____ incinerators, but because they are(ii)_____ to narrow their waste-disposal options.阅读部分【所有题目均出自于真经阅读机经260篇】阅读-正文Passage 147Our study revealed that nest-guarding long-tailed skinks (a species of lizard) homed (returned to their nests) more successfully when displaced shorter distances. There are two reasons why homing success rates decreased with increasing displacement distance. One possibility is that females were simply displaced too far to find their way home. However, this is unlikely given that some individuals managed to find their way home from each distance we used. The second possibility deals with trade-offs between the risks associated with making a long return trip and the benefits of returning. Animals should expend energy only when the associated costs are low. As reptiles increase the time spent moving, their daily energy expenditure increases dramatically. The energetic costs of returning home and the chances that the eggs will have been preyed upon during the return trip both increase substantially as displacement distance increases. For example, the 130 hours (5.5 days) that female skinks spent returning from a distance of 300 meters is sufficient for an egg-eating snake to locate and prey upon the entire clutch. However, females with larger clutches were more likely to home at distances over 50 meters. For these females, the relative fitness benefits associated with having more eggs successfully hatch may outweigh the energetic costs of returning to a nest site, evenif the nest may have already been preyed upon.阅读-选项passage 1471.The primary purpose of the passage is toA. question the validity of research on nest-guarding behavior in long-tailed skinksB. consider explanations for a finding regarding long-tailed skinksC. discuss the importance of homing for long-tailed skinksD. describe the relationship between clutch size and homing success inlong-tailed skinksE. identify the benefits of a behavior common among long-tailed skinks2.The claim in the highlighted sentence assumes which of the following about the individuals that managed to find their way home from each distance?A. They were less able to detect egg-eating predators than were the otherlong-tailed skinks studied.B. They were more averse to risk than were the other long-tailed skinks studiedC. They expended less energy when homing than did the other long-tailed skinks studied.D. They did not possess better homing skills than did the other long-tailed skinks studied.E. They had significantly smaller clutches than did the other long-tailed skinks studied.3.The "second possibility" implies which of the following as a possible explanation for the female long-tailed skinks that failed to home from distances over50 meters ?A. They had relatively small clutches.B. They were unable to find their way home.C. They lacked sufficient energy to home successfully.D. They had male long-tailed skinks guarding their clutches.E. They detected evidence of egg-eating snakes In the vicinity of their nests.阅读-正文Passage 135The revival of mural painting that has occurred in San Francisco since the 1970s, especially among the Chicano population of the city’s Mission District, has marked differences from its social realist forerunner in Mexico and the United States some 40 years earlier. Rather than being government sponsored and limited to murals on government buildings, the contemporary mural movement sprang from the people themselves, with murals appearing on community buildings and throughout college campuses. Perhaps the biggest difference, however, is the process. In earlier twentieth-century Mexico, murals resulted from the vision of individual artists. But today’s murals are characteristically the product s of artists working with local residents on design and creation.Such community engagement is characteristic of the Chicano art movement as a whole, which evolved from the same foundations as the Chicano civil rights movement of the mid-1960s. Both were a direct response to the needs of Chicanos in the United States, who were fighting for the right to adequate education, political empowerment, and decent working conditions. Artists joined other cultural workers in making political statements and played a key role in taking these statements to the public. They developed collectives and established cultural centers that functioned as the public-relations arm of the Chicano sociopolitical movement.阅读-选项passage 1351.The primary purpose of the passage is toA. argue for the superiority of a style of artB. consider the impact of an art movementC. describe the political content of a certain works of artD. detail the characteristic style of an art movementE. place an art movement in its historical context2.According to the passage, which of the following statements about the “cultural centers” is true?A. They were the venue where many later leaders of the Chicano civil rights movement first became politically active.B. Though later widespread, they originated in San Francisco area.C. Springing up in a number of communities, they initially had largely apolitical goals centered on art instruction.D. They constituted the nucleus from which the Chicano civil rights movement originated.E. Founded by artists, they provided support for the Chicano civil rights movement.3.Which of the following best describes the relationship between the first paragraph and the second paragraph of the passage?A. The first focuses on the mural artists as individuals; the second, on their actions as a group.B. The first compares the mural revival with an earlier artistic movement; the second describes the context contemporary to the revivalC. The first defines the revival by distinguishing it from an earlier artistic movement; the second addresses the political goals of both the revival and its forerunnerD. The first presents an apparently plausible account of the relationship between the revival and is forerunner, the second calls that account into questionE. The first is concerned with the artistic aims and ambitions behind the San Francisco murals; the second considers their political significance阅读-正文Passage 26Cuts that need to be held closed in order to heal properly have generally been held closed with stitches. However, pressure to reduce medical costs is mounting. Consequently, it is likely that a newly developed adhesive will become the routine method of holding most types of cuts closed. The new adhesive holds most types of cuts closed as well as stitches do, and the cost of applying it is comparable to that of closing cuts with stitches. But whereas stitches must generally be removed by medical personnel after the cut has healed, the adhesive simply wears off. Thus, for any cut that the adhesive can hold closed as well as stitches can, it is more economical to use the adhesive.阅读-选项passage 261.In the argument given, the two highlighted portions play which of the following roles?A. The first is a claim that the argument disputes; the second provides evidence against that disputed claim.B. The first is a claim that is used as supporting evidence for the main conclusion of the argument; the second is that main conclusion.C. The first is a claim that is used as supporting evidence for the main conclusion of the argument; the second is a conclusion that is drawn in order to support that main conclusion.D. The first introduces a practice about which the argument makes a prediction, the second is a conclusion based on that prediction.E. The first introduces a practice about which the argument makes a prediction; the second is an assessment that is used to support that prediction.阅读-正文Passage 142Many theorists now doubt that heat loss from Earth’s core and radioactive decay are sufficient by themselves to produce all the energy driving the tectonic plates whose movements have helped shaped Earth’s surface. This leaves a loose end in current geological theory. Herbert Shaw argues that because scientists have underestimated the input of substantial amounts of energy from extraterrestrial impactors (asteroids and comets striking Earth), they have difficulty accounting for the difference between the quantity of energy produced from sources intrinsic to Earth and that involved in plate tectonics. Whereas most geologists have treated the addition of energy through the bombardment of Earth’s surface by such impactors as a process separate and independent from the movement of Earth’s tectonic plates, Shaw asserts that these processes are indivisible. Shaw’s revolutionary “op en-system” view recognizes a continuum between terrestrial and extraterrestrial dynamics, whereas modern plate tectonic theory, like the classical geology developed duringthe nineteenth century, is founded on the view that Earth’s geological features have changed through gradual, regular processes intrinsic to Earth, without reference to unique catastrophic events. Classical geology borrowed a decisive, if unspoken, premise from Newton—the independence of Earth’s processes from any astronomical context.阅读-选项passage 1421.The author’s primary purpose is toA. identify the influences informing a particular geological theory about the processes that have shaped Earth’s surfaceB. identify differences between two views of the extraterrestrial impactors and argue that the phenomenon has influenced the development of plate tectonic theoryC. argue that an explanation is based on a dubious evidence and propose an alternative explanationD. discuss an explanation and place that explanation under theoretical contextE. suggest that apparent discrepancy poses a serious problem for a particular theory that many have believed2.The author of the passage mentions the “continuum” in order toA. point out a relationship between plate tectonics and the nineteenth-century geologyB. explain how a theory of Newton’s could influence geology and plate tectonic theory.C. distinguish between two sources of energy that contributed to the development of Earth’s surface.D. point out a similarity between the surface of impactors and the surface of Earth.E. identify a feature of Shaw’s view that deviates from current scientific theories.3.The passage suggests which of the following about tectonic theory?A. It has led scientists to overlook an important contribution to classical geologists from Newton.B. It has been more successful than was classical geology in accounting for heat loss from Earth’s core.C. It is based on premise about Earth’s processes discerned in Newton’s thought.D. It has correctly explained the effects of ex traterrestrial impactors on Earth’s surface.E. It corrects a fundamental flaw in classical geology.阅读-正文Passage 195Wild Diana monkeys are preyed upon by leopards and chimpanzees. These two predators differ in their hunting tactics and Diana monkeys use two distinct antipredator strategies to defend themselves. After detecting a leopard, Diana monkeys respond by giving loud, conspicuous alarm calls that function both to warn others and to signal to the predator that it has been detected. Leopards tend to leave the area once they have been discovered. In contrast, upon detecting a chimpanzee, male Diana monkeys do not vocalize at all, while females give only a few quiet alarm calls and flee quickly to hide in the forest canopy, chimpanzees have sophisticated climbing skills that would allow them to pursue monkeys, even in the high strata of the forest canopy.Choosing an antipredator strategy appropriate to chimpanzees is complicated for Diana monkeys by the fact that chimpanzees themselves also fall prey to leopards. When encountering a leopard, chimpanzees give loud, conspicuous alarm calls. To escape successfully from leopards and chimpanzees, therefore, Diana monkeys must distinguish between, and respond differently to, chimpanzees alarm calls and chimpanzee vocalizations simply signal the presence of a leopard and should elicit the monkeys’ loud, conspicuous alarm calls.To investigate Diana monkeys’ understanding of such cause-effect relationships involving predators, Zuberbuhler examined the monkeys’ r esponses to chimpanzee vocalizations in two different types of experiments. In the first, he played tape recording of either chimpanzees’ alarm calls or their social vocalizations and noted the monkeys’ responses. Diana monkeys differed in their response to chimpanzees’ alarm calls. In some groups, monkeys behaved as if they recognized that these alarm calls signaled the potential presence of a leopard: they responded to chimpanzees’ leopard alarm calls by giving leopard alarm calls themselves, in contrast to their normal response to the presence of chimpanzees. Groups of monkeys living in the core area of the resident chimpanzee community were more likely to behave in this way than were peripheral groups.In the second set of experiments, Zuberbuhler played leopard growls to Diana monkeys shortly after exposing them to recording of either chimpanzees’ alarm calls or their social vocalizations. After first hearing chimpanzees’ alarm calls, some monkeys failed to respond to the subsequent recording of leopard growls, even though this stimulus normally elicited a strong vocal response. These monkeysbehaved exactly like the Diana monkeys in a comparison group, who also gave many leopard alarm calls to an initial recording of leopard growls but no longer called to the second recording of leopard growls five minutes later. This similarity in behavior suggests that these monkeys had some knowledge of the causal factors underlying the production of chimpanzees’ alarm calls.阅读-选项passage 1951.According to the passage, the behavior of male and female Diana monkeys differs in that female Diana monkeysA. give alarm calls upon detecting a chimpanzeeB. hide in the forest canopy upon detecting a leopardC. give loud alarm calls in response to chimpanzees’ alarm callsD. give loud, conspicuous alarm calls upon detecting a leopardE. respond differently to the presence of leopards than they do to the presence of chimpanzees2.It can be inferred that the purpose of the highlighted “loud, conspicuous alarm calls” is in part toA. cause the chimpanzees to leave the areasB. warn other monkeys of the presence of the chimpanzeesC. enable chimpanzees to flee quietly from the leopardD. signal to the chimpanzees that they have been detectedE. signal to the leopard that it has been detected by the monkeys3.The author mentions the “sophisticated climbing skills” of chimpanzees most likely in order to present information that helps toA. explain why chimpanzees are less vulnerable to predation by leopards than are Diana monkeysB. question the hypothesis that Diana monkeys hide in the forest canopy to defend themselves from chimpanzeesC. argue that the antipredator strategies Diana monkeys use to defend themselves against chimpanzeesD. suggest a possible reason for chimpanzees’ and Diana monkeys’ use of similar antipredator strategies to defend themselves against leopards阅读-正文Passage 59Recent studies of ancient Maya water management have found that the urban architecture of some cities was used to divert rainfall runoff into gravity-fed systems of interconnected reservoirs. In the central and southern May Lowlands, this kind of water control was necessary to support large populations throughout the year due to the scarcity of perennial surface water and the seasonal availability of rainfall. Some scholars argue that the concentration of water within the urban core of these sites provided a centralized source of political authority for Maya elites based largely on controlled water access. Such an argument is plausible, however, it is less useful for understanding the sociopolitical implications of water use and control in other, water-rich parts of the Maya region.阅读-选项passage 591.The author of the passage implies which of the following about the political importance of the type of urban water management system described in the passage?A. Because the system was centralized, it allowed political control over a widely scattered population.B. The knowledge required to design and maintain the system became the pretext for Maya elites’ political authority.C. By selectively limiting access to water, Maya elites used the system to curb challenges to their authorityD. The system is not sufficient to explain the sources of centralized political power in all parts of the Maya regionE. The system’s continued maintenance required political authorities to exert control over an increasing proportion of economic resources.Consider each of the choices separately and select all that apply.2.According to the passage, which of the following is true of the water management systems in the central and southern Maya Lowlands?A. They were implemented in part because of the prevailing pattern of rainfall.B. They were an integral part of lowland cities’ architecture.C. They were needed because of insufficient resources such as ponds, rivers and lakes in the lowlands.阅读-正文Passage 48When studying shrimp feeding from hydro-thermal vents at the bottom of the ocean, biologists were surprised that the shrimps’ reproductive cycles followed seasonal patterns. Far beyond the reach of sunlight, and with food abundant around the vents all year round, why should such animals reproduce seasonally? The answer might involve their offspring, which in their larval form drift in the currents to colonize new vents. The larvae must feed during their trip, and their springtime release coincides with a peak in algae raining down from surface waters. So far, researchers have found no evidence of seasonal breeding among vent-dwelling species that provide their offspring with yolk to sustain them or amongvent-dwelling species found in areas of the ocean with not seasonal algae blooms.阅读-选项Passage 481.Which of the following best describes the function of the highlighted sentence?A. It casts doubt on the accuracy of earlier observations of seasonal breeding among shrimp species living near hydro-thermal vents.B. It undermines the explanation proposed for seasonal breeding among some shrimp species living near hydro-thermal vents.C. It suggests that alternative theories are needed to explain seasonal breeding among shrimp species living near hydro-thermal vents.D. It describes the survival benefits to shrimp of mating in parts of the ocean where algae blooms rain down abundantly.E. It supports the explanation proffered for the seasonal breeding observed among some shrimp species living near hydro-thermal vents.Passage 17Early naturalists believed two species of beaver lived in North America: dam beavers and bank beavers. The bank species was thought to resemble the muskrat in behavior, living in burrows or lodges and unable to build dams. In fact, dams are primarily a strategy for dealing with annual variations in water levels. If water levels fall in summer, as they do in most of North America, then beavers lodge entrances may be exposed. With stabilized water levels, their homes are much safer. Along deep rivers, where bank beavers are found, this problem seldom arises. But these beavers do know how to build dams, and do so if the need arises, as may occur if they are forced to relocate after felling and consuming all nearby trees.阅读-选项Passage 171.The passage provides support for which of the following statements about beaver dams?A. One important function of these dams is to protect beavers homes.B. Most are built prior to burrow construction.C. They are found mostly along deep rivers.D. They are routinely abandoned as nearby forests are depleted.E. They mainly protect beavers from rising water levels.2.The passage implies which of the following about beavers?A. Bank beavers are unable to successfully compete with dam beavers when resources become scarce.B. Differences in dam-building behavior among beavers do not necessarily imply multiple beaver species.C. Building dams eventually causes beavers to deplete nearby resources.D. When conditions permit, beavers are more likely to build dams than burrows or lodges.E. In beavers, dam-building is an acquired rather than an innate skill.Passage 161Although initially symptomless, glaucoma can eventually cause blindness when not properly treated. Tests under laboratory conditions of the traditional treatment, daily administration of eyedrops, show it to be as effective in relieving the internal ocular pressure that causes glaucoma as is a new laser-surgical procedure. Yet glaucoma-related blindness occurs in a significantly smaller percentage of patients who have had the surgery than of patients for whom only the eyedrop treatment was prescribed.阅读-选项Passage 1611.Which of following, if true, most helps to explain the low rateglaucoma-related blindness among patients who had the surgery?A. Glaucoma-related blindness is no more common among patients who have had only the surgery than it is among patients who had the surgery after using the eyedropsB. Doctors rarely recommend the surgery for glaucoma patients who have already started the traditional course of treatmentC. There is no known physiological cause of glaucoma other than increase in pressure inside the eyeD. A significant percentage of the people for whom the eyedrop treatment has been prescribed fail to follow the prescribed daily regimen, because the eyedrops have unpleasant side effects.E. The eyedrops traditionally prescribed to treat glaucoma are normally prescribed to treat other disease of the eye.阅读-正文Passage 139Analyzing levels of proportional representation of American Indians in state and local government jobs is important for several reasons. First, the basic idea underlying the theory of representative bureaucracy is that the demographic composition of bureaucracy should mirror the demographic composition of the general public. This is because in addition to its symbolic value, increased access to managerial position may lead to greater responsiveness on the part of policy makersto the policy interests of traditionally disadvantaged groups such as American Indians. Second, the focus on higher level jobs in bureaucracies (as opposed tonon-managerial positions) is especially important because managerial positions represent a major source of economic progress for members of traditionally disadvantaged groups, as these jobs confer good salaries, benefits, status, security, and mobility. Third, it is important to know if there has been growth in the American Indian share of more desirable public sector positions over the last two decades. For instance, Peterson and Duncan argue that the population and power of American Indians have been growing in certain states. Peterson and Duncan also suggest that this growth may reflect the possibility that American Indian population are becoming more active in nontraditional areas of politics, assimilating into mainstream culture, and securing with greater frequency leadership positions in non-tribal government.阅读-选项Passage 1391.The primary purpose of the passage is toA. summarize a demographic trend over timeB. present findings on a demographic groupC. analyze the demographic composition of a type of jobD. explain the need for particular social researchE. argue for the implementation of a social policy2.Which of the following best describes the function of the highlighted sentence in the context of the passage as whole?A. It hypothesizes a phenomenon that might explain a point made in the preceding sentence.B. It provides evidence that undermines that assertion made in the first sentence.C. It offers a projection regarding the development of a trend mentioned earlier in the passage.D. It presents an interpretation of a discrepancy noted earlier in the passage.E. It proposed an implementation of a policy mentioned in the preceding sentence.。

新GRE数学考试算术题试题及答案新GRE数学考试算术题精选试题及答案1．A,B,C,D,E五个人的薪水的median是20000,range不超过50000,其中A,B,C的薪水分别是20000, 40000, 50000,问五个人薪水的平均值可能是多少?(A) 20000(B) 32000(C) 18000(D) 23000(E) 310002. 一个样本在一个标准方差内的概率是0.68,两个标准方差内的概率是0.95. 一样本,mean=18.6,标准方差是6,求:该样本在6.6-12.6内占多少?(A) 0(B) 0.68(C) 0.27(D) 0.36(E) 0.1353. 一组数平均值9,标准方差2,另外一组数平均值3,标准方差1,问第一组数在(5,11)中的数占总数的比例和第二组数在(1,4)中的数占总数的比例哪个大?4. 有100个人都对A,B两个人进行评价,每个人只有两种选择,即好或不好,说A不好的.有59个,说B不好的有65个,问:同时说AB都好的人数和35比较,哪个大?5. 两个集合: A=[-1,-2,-3,-4] B=[-2,3,4,5],问B的A次方有多大的概率是正数?(A) 0(B) 0.5(C) 0.625(D) 0.875(E) 0.135参考答案：1.解：median为20000，range为50000，则本题剩下两数的最小值为0，0，最大值为20000，2000，则平均值最小值为：(0+0+20000+40000+50000)/5 =22000。

平均最大值为：(20000+20000+20000+40000+50000)/5=30000。

所以五人薪水平均值应在 22000和30000之间。

2.解：本题应加入限制条件：应在正态分布中，否则无解。

Weight指平均值，6.6-12.6 指-2个方差与-1个方差之间的概率，所以算发为：(0.95-0.68)/2=0.1353.解：本题同上题，需在正态分布中讨论，(5，11)中的数是1.5个方差中的数，同样(1，4)中的数也是1.5个方差中的数，所以两组数占总数的比例一样大。

2019年12月20日大陆地区GRE考试真题（考生回忆版）数学部分数学 1k是正整数，问k平方-k的余数和1比较大小关系数学 2有一个委员会，6个professor3个manager4个coordinator，要求组成一个5人的小组。

要求profeesor中的Dr.W和 manager中的Ms.M都要在有多少种办法数学 3P和N都是质数，P-N=4，P除以N小于2大于2/3，问p的值是多少数学 42≤r＜s≤6，r和s都是整数，问(r+s)/rs的最大值是多少数学 5小区每天送104份报纸，其中要3份报纸的家庭数量是要1份报纸的家庭数量的2倍，要2份报纸的家庭数量是要1份报纸家庭数量的3倍，问要2份报纸的家庭数量是多少数学 6F club有20000人，M club 30000人，加一起的membership是45000，问从F club里选一个人，他同时有M club membership的概率是多少数学72的32次方除以3的余数是多少数学8一共80名学生，physical club 60 人，chemistry club 50 人，biography 35人，每个学生至少参加一个俱乐部，没有学生三个都参加，以下哪个可能是既参加biography 又参加chemistry的学生数目？A. 0B. 5C. 10D. 15E. 20F. 25G. 30H. 35数学9一个三位数，每个数位上可以选择的有12345，不能重复，问这个三位数有多少种可能性数学10玩游戏，可以拿2point或4point，小明的average是3.8，问拿2分的次数的9倍，和拿4分的次数的大小关系数学114个不同的玩具分给3个不同的小孩，每个小孩都至少有一个礼物，每个玩具也必须分给小孩，求一共有多少种不同的分法数学12每层N本书，一共S层，然后把最上面一层的数平均分配到其他层，问分完之后每层有多少本书填空部分【所有题目均出自于真经填空机经1250题】填空100-1The professor’s tendency to commandeer faculty meetings to promote her personal agenda quickly inspired resentment among other faculty, who objected to such _____.A. appropriationB. obfuscationC. cavilingD. vacillationE. cronyism填空65-6Industry-sponsored scientific research on chemical safety often (i)_____. Media reports regularly imply that industry support of scientific work is alone sufficient to (ii)_____ that research. Even though the source of funding has been determined to be a less significant cause of bias than other factors, industry support suffices, in the minds of many people, to (iii)_____ the credibility of scientific work.填空5-9Although one can adduce myriad of examples of ecosystem disruption by nonindigenousspecies, nevertheless most introduced species that survive in fact appear to have quite _____ effects on the ecosystem they have invaded.A. minimalB. triflingC. markedD. conspicuousE. intriguingF. deleterious填空20-3Historian Barbara Alpern Engel’s task in writing a book about women in Russia must have been a (i)_____ one, because the (ii)_____ the Russian empire’s peoplesmeant that Russian women could never be treated as a homogeneous group.填空81-6Filler claims that after the social welfare programs of the 1960s, belief that the government has an obligation to provide decent housing for citizens who cannot afford it was (i)_____ in the United States by the notion that providing suitable shelter for everyone should be (ii)_____. Thus today in the (iii)_____ oftaxpayer-sponsored initiatives we have volunteer home-construction programs, honorable in intent but pitifully limited in scope.填空11-7Changes made to ecosystem in order to achieve a goal, such as food production or flood control, often _____ significant unforeseen trade-offs between other important products and service the ecosystems provide.A. predictB. delayC. foretellD. obscureE. yieldF. engender填空38-3Convinced of the gravity of her poetry, Voigt must have found the reviews of her most recent collection (i)_____ reading: one amused reviewer thought that it was unrecognizable as poetry but decidedly (ii)_____.填空48-3The description of humans as having an internal clock is not a (i)_____. Or rather, it is—you do not have a tiny watch in your cerebellum—but it also refers to (ii)_____, a specialized bundle of cells that regulates cyclical processes.填空38-4The author’s best-selling book on Virginia Woolf is not (i)_____ treatment of her subject; on the contrary, it presents (ii)_____ portrait of the novelist, faults and all.填空 88-9The life of a secret agent is dangerous enough, but the life of a double agent is infinitely more ______: a single slip can send an agent crashing to destruction.A. arduousB. precariousC. clandestineD. perilousE. covertF. exhilarating填空3-4Many of the towns that have voted to keep incinerators in the county’s solid waste plan have done so not because they necessarily (i)_____ incinerators, but because they are(ii)_____ to narrow their waste-disposal options.阅读部分【所有题目均出自于真经阅读机经260篇】阅读-正文Passage 147Our study revealed that nest-guarding long-tailed skinks (a species of lizard) homed (returned to their nests) more successfully when displaced shorter distances. There are two reasons why homing success rates decreased with increasing displacement distance. One possibility is that females were simply displaced too far to find their way home. However, this is unlikely given that some individuals managed to find their way home from each distance we used. The second possibility deals with trade-offs between the risks associated with making a long return trip and the benefits of returning. Animals should expend energy only when the associated costs are low. As reptiles increase the time spent moving, their daily energy expenditure increases dramatically. The energetic costs of returning home and the chances that the eggs will have been preyed upon during the return trip both increase substantially as displacement distance increases. For example, the 130 hours (5.5 days) that female skinks spent returning from a distance of 300 meters is sufficient for an egg-eating snake to locate and prey upon the entire clutch. However, females with larger clutches were more likely to home at distances over 50 meters. For these females, the relative fitness benefits associated with having more eggs successfully hatch may outweigh the energetic costs of returning to a nest site, evenif the nest may have already been preyed upon.阅读-选项passage 1471.The primary purpose of the passage is toA. question the validity of research on nest-guarding behavior in long-tailed skinksB. consider explanations for a finding regarding long-tailed skinksC. discuss the importance of homing for long-tailed skinksD. describe the relationship between clutch size and homing success inlong-tailed skinksE. identify the benefits of a behavior common among long-tailed skinks2.The claim in the highlighted sentence assumes which of the following about the individuals that managed to find their way home from each distance?A. They were less able to detect egg-eating predators than were the otherlong-tailed skinks studied.B. They were more averse to risk than were the other long-tailed skinks studiedC. They expended less energy when homing than did the other long-tailed skinks studied.D. They did not possess better homing skills than did the other long-tailed skinks studied.E. They had significantly smaller clutches than did the other long-tailed skinks studied.3.The "second possibility" implies which of the following as a possible explanation for the female long-tailed skinks that failed to home from distances over50 meters ?A. They had relatively small clutches.B. They were unable to find their way home.C. They lacked sufficient energy to home successfully.D. They had male long-tailed skinks guarding their clutches.E. They detected evidence of egg-eating snakes In the vicinity of their nests.阅读-正文Passage 135The revival of mural painting that has occurred in San Francisco since the 1970s, especially among the Chicano population of the city’s Mission District, has marked differences from its social realist forerunner in Mexico and the United States some 40 years earlier. Rather than being government sponsored and limited to murals on government buildings, the contemporary mural movement sprang from the people themselves, with murals appearing on community buildings and throughout college campuses. Perhaps the biggest difference, however, is the process. In earlier twentieth-century Mexico, murals resulted from the vision of individual artists. But today’s murals are characteristically the product s of artists working with local residents on design and creation.Such community engagement is characteristic of the Chicano art movement as a whole, which evolved from the same foundations as the Chicano civil rights movement of the mid-1960s. Both were a direct response to the needs of Chicanos in the United States, who were fighting for the right to adequate education, political empowerment, and decent working conditions. Artists joined other cultural workers in making political statements and played a key role in taking these statements to the public. They developed collectives and established cultural centers that functioned as the public-relations arm of the Chicano sociopolitical movement.阅读-选项passage 1351.The primary purpose of the passage is toA. argue for the superiority of a style of artB. consider the impact of an art movementC. describe the political content of a certain works of artD. detail the characteristic style of an art movementE. place an art movement in its historical context2.According to the passage, which of the following statements about the “cultural centers” is true?A. They were the venue where many later leaders of the Chicano civil rights movement first became politically active.B. Though later widespread, they originated in San Francisco area.C. Springing up in a number of communities, they initially had largely apolitical goals centered on art instruction.D. They constituted the nucleus from which the Chicano civil rights movement originated.E. Founded by artists, they provided support for the Chicano civil rights movement.3.Which of the following best describes the relationship between the first paragraph and the second paragraph of the passage?A. The first focuses on the mural artists as individuals; the second, on their actions as a group.B. The first compares the mural revival with an earlier artistic movement; the second describes the context contemporary to the revivalC. The first defines the revival by distinguishing it from an earlier artistic movement; the second addresses the political goals of both the revival and its forerunnerD. The first presents an apparently plausible account of the relationship between the revival and is forerunner, the second calls that account into questionE. The first is concerned with the artistic aims and ambitions behind the San Francisco murals; the second considers their political significance阅读-正文Passage 26Cuts that need to be held closed in order to heal properly have generally been held closed with stitches. However, pressure to reduce medical costs is mounting. Consequently, it is likely that a newly developed adhesive will become the routine method of holding most types of cuts closed. The new adhesive holds most types of cuts closed as well as stitches do, and the cost of applying it is comparable to that of closing cuts with stitches. But whereas stitches must generally be removed by medical personnel after the cut has healed, the adhesive simply wears off. Thus, for any cut that the adhesive can hold closed as well as stitches can, it is more economical to use the adhesive.阅读-选项passage 261.In the argument given, the two highlighted portions play which of the following roles?A. The first is a claim that the argument disputes; the second provides evidence against that disputed claim.B. The first is a claim that is used as supporting evidence for the main conclusion of the argument; the second is that main conclusion.C. The first is a claim that is used as supporting evidence for the main conclusion of the argument; the second is a conclusion that is drawn in order to support that main conclusion.D. The first introduces a practice about which the argument makes a prediction, the second is a conclusion based on that prediction.E. The first introduces a practice about which the argument makes a prediction; the second is an assessment that is used to support that prediction.阅读-正文Passage 142Many theorists now doubt that heat loss from Earth’s core and radioactive decay are sufficient by themselves to produce all the energy driving the tectonic plates whose movements have helped shaped Earth’s surface. This leaves a loose end in current geological theory. Herbert Shaw argues that because scientists have underestimated the input of substantial amounts of energy from extraterrestrial impactors (asteroids and comets striking Earth), they have difficulty accounting for the difference between the quantity of energy produced from sources intrinsic to Earth and that involved in plate tectonics. Whereas most geologists have treated the addition of energy through the bombardment of Earth’s surface by such impactors as a process separate and independent from the movement of Earth’s tectonic plates, Shaw asserts that these processes are indivisible. Shaw’s revolutionary “op en-system” view recognizes a continuum between terrestrial and extraterrestrial dynamics, whereas modern plate tectonic theory, like the classical geology developed duringthe nineteenth century, is founded on the view that Earth’s geological features have changed through gradual, regular processes intrinsic to Earth, without reference to unique catastrophic events. Classical geology borrowed a decisive, if unspoken, premise from Newton—the independence of Earth’s processes from any astronomical context.阅读-选项passage 1421.The author’s primary purpose is toA. identify the influences informing a particular geological theory about the processes that have shaped Earth’s surfaceB. identify differences between two views of the extraterrestrial impactors and argue that the phenomenon has influenced the development of plate tectonic theoryC. argue that an explanation is based on a dubious evidence and propose an alternative explanationD. discuss an explanation and place that explanation under theoretical contextE. suggest that apparent discrepancy poses a serious problem for a particular theory that many have believed2.The author of the passage mentions the “continuum” in order toA. point out a relationship between plate tectonics and the nineteenth-century geologyB. explain how a theory of Newton’s could influence geology and plate tectonic theory.C. distinguish between two sources of energy that contributed to the development of Earth’s surface.D. point out a similarity between the surface of impactors and the surface of Earth.E. identify a feature of Shaw’s view that deviates from current scientific theories.3.The passage suggests which of the following about tectonic theory?A. It has led scientists to overlook an important contribution to classical geologists from Newton.B. It has been more successful than was classical geology in accounting for heat loss from Earth’s core.C. It is based on premise about Earth’s processes discerned in Newton’s thought.D. It has correctly explained the effects of ex traterrestrial impactors on Earth’s surface.E. It corrects a fundamental flaw in classical geology.阅读-正文Passage 195Wild Diana monkeys are preyed upon by leopards and chimpanzees. These two predators differ in their hunting tactics and Diana monkeys use two distinct antipredator strategies to defend themselves. After detecting a leopard, Diana monkeys respond by giving loud, conspicuous alarm calls that function both to warn others and to signal to the predator that it has been detected. Leopards tend to leave the area once they have been discovered. In contrast, upon detecting a chimpanzee, male Diana monkeys do not vocalize at all, while females give only a few quiet alarm calls and flee quickly to hide in the forest canopy, chimpanzees have sophisticated climbing skills that would allow them to pursue monkeys, even in the high strata of the forest canopy.Choosing an antipredator strategy appropriate to chimpanzees is complicated for Diana monkeys by the fact that chimpanzees themselves also fall prey to leopards. When encountering a leopard, chimpanzees give loud, conspicuous alarm calls. To escape successfully from leopards and chimpanzees, therefore, Diana monkeys must distinguish between, and respond differently to, chimpanzees alarm calls and chimpanzee vocalizations simply signal the presence of a leopard and should elicit the monkeys’ loud, conspicuous alarm calls.To investigate Diana monkeys’ understanding of such cause-effect relationships involving predators, Zuberbuhler examined the monkeys’ r esponses to chimpanzee vocalizations in two different types of experiments. In the first, he played tape recording of either chimpanzees’ alarm calls or their social vocalizations and noted the monkeys’ responses. Diana monkeys differed in their response to chimpanzees’ alarm calls. In some groups, monkeys behaved as if they recognized that these alarm calls signaled the potential presence of a leopard: they responded to chimpanzees’ leopard alarm calls by giving leopard alarm calls themselves, in contrast to their normal response to the presence of chimpanzees. Groups of monkeys living in the core area of the resident chimpanzee community were more likely to behave in this way than were peripheral groups.In the second set of experiments, Zuberbuhler played leopard growls to Diana monkeys shortly after exposing them to recording of either chimpanzees’ alarm calls or their social vocalizations. After first hearing chimpanzees’ alarm calls, some monkeys failed to respond to the subsequent recording of leopard growls, even though this stimulus normally elicited a strong vocal response. These monkeysbehaved exactly like the Diana monkeys in a comparison group, who also gave many leopard alarm calls to an initial recording of leopard growls but no longer called to the second recording of leopard growls five minutes later. This similarity in behavior suggests that these monkeys had some knowledge of the causal factors underlying the production of chimpanzees’ alarm calls.阅读-选项passage 1951.According to the passage, the behavior of male and female Diana monkeys differs in that female Diana monkeysA. give alarm calls upon detecting a chimpanzeeB. hide in the forest canopy upon detecting a leopardC. give loud alarm calls in response to chimpanzees’ alarm callsD. give loud, conspicuous alarm calls upon detecting a leopardE. respond differently to the presence of leopards than they do to the presence of chimpanzees2.It can be inferred that the purpose of the highlighted “loud, conspicuous alarm calls” is in part toA. cause the chimpanzees to leave the areasB. warn other monkeys of the presence of the chimpanzeesC. enable chimpanzees to flee quietly from the leopardD. signal to the chimpanzees that they have been detectedE. signal to the leopard that it has been detected by the monkeys3.The author mentions the “sophisticated climbing skills” of chimpanzees most likely in order to present information that helps toA. explain why chimpanzees are less vulnerable to predation by leopards than are Diana monkeysB. question the hypothesis that Diana monkeys hide in the forest canopy to defend themselves from chimpanzeesC. argue that the antipredator strategies Diana monkeys use to defend themselves against chimpanzeesD. suggest a possible reason for chimpanzees’ and Diana monkeys’ use of similar antipredator strategies to defend themselves against leopards阅读-正文Passage 59Recent studies of ancient Maya water management have found that the urban architecture of some cities was used to divert rainfall runoff into gravity-fed systems of interconnected reservoirs. In the central and southern May Lowlands, this kind of water control was necessary to support large populations throughout the year due to the scarcity of perennial surface water and the seasonal availability of rainfall. Some scholars argue that the concentration of water within the urban core of these sites provided a centralized source of political authority for Maya elites based largely on controlled water access. Such an argument is plausible, however, it is less useful for understanding the sociopolitical implications of water use and control in other, water-rich parts of the Maya region.阅读-选项passage 591.The author of the passage implies which of the following about the political importance of the type of urban water management system described in the passage?A. Because the system was centralized, it allowed political control over a widely scattered population.B. The knowledge required to design and maintain the system became the pretext for Maya elites’ political authority.C. By selectively limiting access to water, Maya elites used the system to curb challenges to their authorityD. The system is not sufficient to explain the sources of centralized political power in all parts of the Maya regionE. The system’s continued maintenance required political authorities to exert control over an increasing proportion of economic resources.Consider each of the choices separately and select all that apply.2.According to the passage, which of the following is true of the water management systems in the central and southern Maya Lowlands?A. They were implemented in part because of the prevailing pattern of rainfall.B. They were an integral part of lowland cities’ architecture.C. They were needed because of insufficient resources such as ponds, rivers and lakes in the lowlands.阅读-正文Passage 48When studying shrimp feeding from hydro-thermal vents at the bottom of the ocean, biologists were surprised that the shrimps’ reproductive cycles followed seasonal patterns. Far beyond the reach of sunlight, and with food abundant around the vents all year round, why should such animals reproduce seasonally? The answer might involve their offspring, which in their larval form drift in the currents to colonize new vents. The larvae must feed during their trip, and their springtime release coincides with a peak in algae raining down from surface waters. So far, researchers have found no evidence of seasonal breeding among vent-dwelling species that provide their offspring with yolk to sustain them or amongvent-dwelling species found in areas of the ocean with not seasonal algae blooms.阅读-选项Passage 481.Which of the following best describes the function of the highlighted sentence?A. It casts doubt on the accuracy of earlier observations of seasonal breeding among shrimp species living near hydro-thermal vents.B. It undermines the explanation proposed for seasonal breeding among some shrimp species living near hydro-thermal vents.C. It suggests that alternative theories are needed to explain seasonal breeding among shrimp species living near hydro-thermal vents.D. It describes the survival benefits to shrimp of mating in parts of the ocean where algae blooms rain down abundantly.E. It supports the explanation proffered for the seasonal breeding observed among some shrimp species living near hydro-thermal vents.Passage 17Early naturalists believed two species of beaver lived in North America: dam beavers and bank beavers. The bank species was thought to resemble the muskrat in behavior, living in burrows or lodges and unable to build dams. In fact, dams are primarily a strategy for dealing with annual variations in water levels. If water levels fall in summer, as they do in most of North America, then beavers lodge entrances may be exposed. With stabilized water levels, their homes are much safer. Along deep rivers, where bank beavers are found, this problem seldom arises. But these beavers do know how to build dams, and do so if the need arises, as may occur if they are forced to relocate after felling and consuming all nearby trees.阅读-选项Passage 171.The passage provides support for which of the following statements about beaver dams?A. One important function of these dams is to protect beavers homes.B. Most are built prior to burrow construction.C. They are found mostly along deep rivers.D. They are routinely abandoned as nearby forests are depleted.E. They mainly protect beavers from rising water levels.2.The passage implies which of the following about beavers?A. Bank beavers are unable to successfully compete with dam beavers when resources become scarce.B. Differences in dam-building behavior among beavers do not necessarily imply multiple beaver species.C. Building dams eventually causes beavers to deplete nearby resources.D. When conditions permit, beavers are more likely to build dams than burrows or lodges.E. In beavers, dam-building is an acquired rather than an innate skill.Passage 161Although initially symptomless, glaucoma can eventually cause blindness when not properly treated. Tests under laboratory conditions of the traditional treatment, daily administration of eyedrops, show it to be as effective in relieving the internal ocular pressure that causes glaucoma as is a new laser-surgical procedure. Yet glaucoma-related blindness occurs in a significantly smaller percentage of patients who have had the surgery than of patients for whom only the eyedrop treatment was prescribed.阅读-选项Passage 1611.Which of following, if true, most helps to explain the low rateglaucoma-related blindness among patients who had the surgery?A. Glaucoma-related blindness is no more common among patients who have had only the surgery than it is among patients who had the surgery after using the eyedropsB. Doctors rarely recommend the surgery for glaucoma patients who have already started the traditional course of treatmentC. There is no known physiological cause of glaucoma other than increase in pressure inside the eyeD. A significant percentage of the people for whom the eyedrop treatment has been prescribed fail to follow the prescribed daily regimen, because the eyedrops have unpleasant side effects.E. The eyedrops traditionally prescribed to treat glaucoma are normally prescribed to treat other disease of the eye.阅读-正文Passage 139Analyzing levels of proportional representation of American Indians in state and local government jobs is important for several reasons. First, the basic idea underlying the theory of representative bureaucracy is that the demographic composition of bureaucracy should mirror the demographic composition of the general public. This is because in addition to its symbolic value, increased access to managerial position may lead to greater responsiveness on the part of policy makersto the policy interests of traditionally disadvantaged groups such as American Indians. Second, the focus on higher level jobs in bureaucracies (as opposed tonon-managerial positions) is especially important because managerial positions represent a major source of economic progress for members of traditionally disadvantaged groups, as these jobs confer good salaries, benefits, status, security, and mobility. Third, it is important to know if there has been growth in the American Indian share of more desirable public sector positions over the last two decades. For instance, Peterson and Duncan argue that the population and power of American Indians have been growing in certain states. Peterson and Duncan also suggest that this growth may reflect the possibility that American Indian population are becoming more active in nontraditional areas of politics, assimilating into mainstream culture, and securing with greater frequency leadership positions in non-tribal government.阅读-选项Passage 1391.The primary purpose of the passage is toA. summarize a demographic trend over timeB. present findings on a demographic groupC. analyze the demographic composition of a type of jobD. explain the need for particular social researchE. argue for the implementation of a social policy2.Which of the following best describes the function of the highlighted sentence in the context of the passage as whole?A. It hypothesizes a phenomenon that might explain a point made in the preceding sentence.B. It provides evidence that undermines that assertion made in the first sentence.C. It offers a projection regarding the development of a trend mentioned earlier in the passage.D. It presents an interpretation of a discrepancy noted earlier in the passage.E. It proposed an implementation of a policy mentioned in the preceding sentence.。

2019年GRE考试数学代数应用历年真题解析GRE考试是许多考生所追求的目标，其中数学部分是考生普遍认为较难的部分之一。

本文将解析2019年GRE考试数学代数应用部分的历年真题，帮助考生更好地理解和应对此类考题。

第一道题目：题目内容：在二维平面上，点A的坐标为（4，6），点B的坐标为（-3，2），点C的坐标为（7，-1）。

若点D在线段AB上，且AB与CD平行，求点D的坐标。

解析：为了找到点D的坐标，我们需要首先计算线段AB的斜率。

斜率的计算公式为：m = (y2 - y1) / (x2 - x1)，其中（x1，y1）为线段的起点坐标，（x2，y2）为终点坐标。

根据题目给出的坐标，我们可以计算出线段AB的斜率为：m = (2 - 6) / (-3 - 4) = -4/7。

由于线段AB与CD平行，所以线段CD的斜率也为-4/7。

我们可以利用斜率的定义来确定点D的坐标。

已知点C的坐标为（7，-1），且斜率为-4/7，我们可以设点D的坐标为（x，y）。

根据斜率的定义，我们可以得到以下等式：m = (y2 - y1) / (x2 - x1) = (-1 - y) / (7 - x)将AB的斜率带入等式中得到：-4/7 = (-1 - y) / (7 - x)通过求解上述等式组，我们可以得到点D的坐标为（5，1）。

第二道题目：题目内容：已知函数f(x) = x^2 - 3x + 2，求f(1) + f(2) + ... + f(10)的值。

解析：我们需要计算表达式f(1) + f(2) + ... + f(10)的值。

首先，我们可以根据给定的函数，计算出f(x)的值：当x = 1时，f(1) = 1^2 - 3*1 + 2 = 0；当x = 2时，f(2) = 2^2 - 3*2 + 2 = 2；...当x = 10时，f(10) = 10^2 - 3*10 + 2 = 72。

将上述计算结果相加，我们得到f(1) + f(2) + ... + f(10) = 0 + 2 + ... + 72 = 390。

2019年GRE数学练习题及答案
以下是GRE数学150题练习：第一天。

希望对大家GRE备考有所协助。

1、一个红袋子放红球100个，一个绿袋子绿球100个，从红袋子
里拿10个放到绿袋子里，再从绿袋子里拿10个放到红袋子里，那现
在是红袋子里的红球多，还是绿袋子里的绿球多??
解：一样多
2、 x1，x2，x3干活花n个小时，x2，x3干此活花m个小时，
rate保持不变，问x1干此或要多少时间?*(m、n为具体数)
解：(x1+x2+x3)n=m(X2+X3)=?X1
->X2+X3=nX1/(m-n)(X2+X3)
->?=m(X2+X3)/X1=mn/(m-n) (sure)
3、某人车的240升油箱中月初为15/16的满，这人只在月中加了100升油，月末时油箱只有3/8满、问这个月油耗量、
答：(简单) 240 * 15/16 + 100- 240* 3/8=235(升)
4、A 在B西30，北20这么个位置，C在B东10，AC与B正北方
向的直线的交点距离B的距离。

嗨，中英文都有点绕。

题不难，千万
看清了。

MY KEY：5 相似三角行解题：x：20=10：(10+30) 得出x=5
5、有一道图表题，给出了几个地方1987年的什么数字以及从86
年到87年增长的比例。

计算86年这几个地方的和。

计算量较大，大
家记住4，400，000就能够了。