单选题. ①There is mounting evidence that the frequency and magnitude of landsliding is changing in many parts of the world in response to climate change. ②This is not surprising, given that precipitation is one of the two external triggering mechanisms—the other being seismic activity—involved in the formation of landslides. ③Evidence from the past clearly indicates that cycles of elevated landslide activity have been followed by cycles of low activity, and that these are correlated with climate fluctuations over a variety of timescales. ①What sets current changes in landslide activity apart is the likely influence of anthropogenic [i.e., human-caused] factors, either acting alone or in concert with climate, which can further modify the process of landsliding and the nature of ecosystem responses. ②Among these factors, deforestation and land-use change have the potential to influence the frequency and magnitude of landsliding because of their direct effects on vegetation attributes that influence slope stability. ③The extent and conditions under which mountain ecosystems are resilient to these changes—that is, the amount of disturbance they can absorb before changing into states with different structure and function—are not known. ④Addressing this issue is crucial for the long-term conservation of mountainscapes.7. The author of the passage cites "evidence from the past" in order to ______

单选题x2=81Quantity A: xQuantity B: 8

单选题All the three sides of one quadrangle are 3Quantity A: the fourth side of the quadrangleQuantity B: 3

单选题. ① Received feminist wisdom has conceived of history as a male enclave devoid of woman subjects and practitioners, particularly before the twentieth century. ②As Ann For Freedom put it in 1972, from Herodout's to Will Durant's histories, the main characters, the main viewpoints and interests, have all been male. ③Feminist accounts of the 1970s and 1980s viewed historiography (the writing of history) as overwhelmingly his, coining the term herstory and presenting it as a compensatory feminist practice. ④Herstory designated women's place at the center of an alternative narrative of past events. ⑤Rosalind Miles's description restates the popular view: Women's history by contrast has only just begun to invent itself. ⑥Males gained entry to the business of recording, defining and interpreting events in the third millennium B.C.; for women, this process did not even begin until the nineteenth century. ⑦The herstorical method provided a means for feminist historians to explore materials by and about women that had previously been neglected or ignored. ⑧Herstory promoted curricular transformation in schools and was used as a slogan on T-shirts, pencils, and buttons. ⑨Exposing historian's tacit and intentional sexism, herstorians set out to correct the record—to show that women had held up half the historical sky. ①Despite the great scholarly gains made behind the rallying cry, herstory's popular myth– particularly about the lack of women who have recorded history–require revision. ②Herstory may accurately describe feminists efforts to construct female-centered accounts of the past, but the term inadvertently blinds us to women's important contributions to historical discourse before the nineteenth century. ③Historiography has not been an entirely male preserve, though feminists are justified in faulting its long-standing masculine contours. ④In fact, criticism of historiography's sexism is not of recent origin. ⑤Early eighteenth-century feminist Mary Astell protested that the Men being the Historians, they seldom condescend to record the great and good actions of Women. ⑥Astell, like those who echoed her sentiments two and a half centuries later, must be credited for admirable zeal in setting out to right scholarly wrongs, but her supposition that historians were only male is inaccurate. ⑦Her perception is especially strange because she herself wrote a historical work, An Impartial Enquiry into the Cause of Rebellion and Civil War (1704). ⑧Astell's judgment is at the same time understandable, given that much historical writing by women of the late seventeenth century was not published until the nineteenth century. ⑨Despite their courage and their rightful anger, Astell and her descendants overlooked early modern woman writer's contributions to historiography.38. It can be inferred that Rosalind Miles refers to the third millennium B.C. primarily in order to ______

单选题29. Rain-soaked soil contains less oxygen than does drier soil. The roots of melon plants perform less efficiently under the low-oxygen conditions present in rainsoaked soil. When the efficiency of melon roots is impaired, the roots do not supply sufficient amounts of the proper nutrients for the plants to perform photosynthesis at their usual levels. It follows that melon plants have a lower-than-usual rate of photosynthesis when their roots are in rain-soaked soil. When the photosynthesis of the plants slows, sugar stored in the fruits is drawn off to supply the plants with energy. Therefore, ripe melons harvested after a prolonged period of heavy rain should be less sweet than other ripe melons. In the argument given, the two portions in boldface play which of the following roles? ______

单选题. ① Although social learning (the acquisition of specific behaviors by observing other individuals exhibiting those behaviors) is well documented among fish, few studies have investigated social learning within a developmental context in these taxa. ②Rather than investigating the development of a particular skill, Chapman, Ward, and Krause investigated the role of group density during development in later foraging success in laboratory-housed guppies. ③When raised with a small number of conspecifics (members of the same species), guppies were quicker to locate food by following a trained adult guppy than were guppies raised in large groups. ④This counterintuitive finding is explained by the fact that guppies reared in the high density condition were less likely to shoal (swim in a group) with others and, therefore, were less likely to learn the benefits of social learning. ⑤Instead, fish reared in high-density situations may learn that conspecifics are to be viewed as competitors, rather than as potential sources of adaptive information. ⑥This finding suggests that at least for guppies, the early social environment may have an effect on the capacity for social learning, if not on the socially learned behaviors themselves.32. The primary purpose of the passage is to ______

单选题Quantity A: 335999Quantity B: 110333

单选题从100到999inclusive中取出一个数，这个数中3个数字都相同的概率是多少?

单选题. ①Although many hypotheses have been proposed to explain why some plant communities are more susceptible than others to invasion by nonnative species, results from field studies have been inconsistent and no general theory of invasibility has yet emerged. ②However, a theory based on fluctuating resource availability could integrate most existing hypotheses and successfully resolve many of the apparently conflicting and ambiguous results of previous studies. ③The suggested theory is that a plant community becomes more susceptible to invasion whenever there is an increase in the amount of unused resources. ①The diversity in the range of resource-release mechanisms could partly explain the absence of consistent ecological correlates of invasibility. ②In particular, the theory predicts that there will be no necessary relationship between the species diversity of a plant community and its susceptibility to invasion, since nearcomplete exploitation can each occur in both species-rich and species-poor communities. ③Though Lonsdale found a positive association between species richness and invasion, this may arise from the tendency of diverse plant communities to be nutrient poor and therefore more responsive to the effects of human-caused influxes of nutrients.11. The passage is primarily concerned with ______

单选题Five numbers{1，2，3，4，5}are going to arranged in a row，if the odd numbers can not be arranged next to each other，问能够构成多少个5位数?

单选题8. Spiders of many species change color to resemble the color of the flowers they sit on. Many animals that prey on such spiders possess color discrimination so acute that they, unlike human beings, can readily see the spiders despite the seeming camouflage. It is unlikely, therefore, that the spiders' color changes confer significant survival benefit on these spiders. Which of the following would it be most useful to determine in order to evaluate the argument? ______

单选题. ①Despite the extravagant colors of the flowers bees visit, until the early 1900s it was commonly thought that bees were entirely color-blind. ②To test this, zoologist Karl von Frisch set out an array of dishes on cards. ③The dish on one card, the only blue card among varying grays, contained sugar water. ④Once bees learned to visit this card and dish combination, he varied its position in the matrix. ⑤Next, he replaced all the cards and dishes with a new set of identical materials, only now leaving the blue card's dish empty. ⑥The bees nonetheless returned to the blue card. ⑦If their vision were monochromatic, they would likely have found at least some of the gray cards indistinguishable from the blue.19. The author of the passage refers to "extravagant colors" primarily to ______

单选题 ①As it was published in 1935, Mules and Men

单选题When 10 percent of 5,000 is subtracted from eight percent of 2,000, the difference is

单选题36. The appearance of the star Gamma Cephei varies regularly. The existence of a planet circling a star can cause regular variation in its appearance. However, the regular variation in Gamma Cephei's appearance is no reason to think that there is a planet circling it, since the slow rotation of a star can also cause its appearance to vary regularly and ______. Which of the following most logically completes the argument? ______ A many stars that have planets circling them rotate slowly B. Gamma Cephei varies more in appearance than many other stars do C. it is easier to determine the speed at which a star rotates than to determine whether a planet is circling it D. analysis of sunspot activity on Gamma Cephei shows that it rotates slowly E. Gamma Cephei is only one of many stars that vary regularly in appearance

单选题. ①An Irish newspaper editorial encouraging women to participate in the nonimportation movement launched in Ireland in 1779 appears consistent with a perception that the political use of the consumer boycott originated in North America and spread eastwards across the Atlantic to Ireland. ②This is a view that most historians have concurred with. ③For example, T H Breen argued that the consumer boycott was a brilliantly original American invention. ④Breen did acknowledge that a few isolated boycotts may have taken place in other countries. ⑤However, Mary O'Dowd argues that from the late seventeenth century, Irish political discourse advocated the nonconsumption of imported goods and support for home manufactures by women in ways that were strikingly similar to those used later in North America.25. The passage is primarily concerned with ______

单选题. ①Founder mutations are a class of disease-causing genetic mutations, each derived from its own ancestral ''founder" in whom the mutation originated. ②While most disease-causing mutations are found in humans at a rate of one in a few thousand to one in a few million people, founder mutation can occur at much higher rates. ③This apparent anomaly is partially explained by the fact that most founder mutations are recessive: only a person with copies of the affected gene from both parents becomes ill. ④Most people with only one copy of the gene—"carriers"—survive and pass the gene to offspring. ⑤Furthermore, the single copy of a founder mutation often confers a survival advantage on carriers. ⑥For example, the hereditary hemochromatosis mutation protects carriers from iron-deficiency anemia because the mutated gene allows increased efficiency of iron absorption.24. The passage indicates which of the following about founder mutations? ______

单选题. ①The disappearance of Steller's sea cow from the Bering and Copper islands by 1768 has long been blamed on intensive hunting. ②But its disappearance took only 28 years from the time Steller first described the species, a remarkably short time for hunting alone to depopulate the islands, especially given the large populations initially reported. ③However, by 1750, hunters had also targeted nearby sea otter populations. ④Fewer otters would have allowed sea urchin populations on which the otters preyed to expand and the urchins' grazing pressure on kelp forests to increase. ⑤Sea cows were totally dependent on kelp for food, and within a decade of the onset of otter hunting, Steller noted that the islands' sea cows appeared malnourished.43. Which of the following can be inferred from the passage about kelp forests in the Bering and Copper islands between 1750 and 1768? ______

单选题. ①Only since the late 1960s have literary scholars attempted to establish an accurate and systematic literary history of women novelists. ②Many previous histories suffered from "Great Traditionalism," an approach that, by limiting itself to a group of women writers termed "great," ignored the diversity among women novelists. ③These histories excluded the minor novelists, who are the links in the chain that binds literary generations together, and who allow us to see the continuities in women's writing. ④Given the distortions produced by this concentration on "great" writers, as well as the obviously problematic tendency of many literary scholars to apply stereotypes of femininity, it was not surprising that some literary scholars in the early 1960s evaded the important issue of women's sexual identity entirely, focusing instead on the form and style of women's writing. ⑤Such an approach, while insightful and very valuable, did not consider the crucial connections between women's writing and changes in their legal and economic status.27. According to the passage, some literary scholars in the early 1960s tended to do which of the following in their considerations of women novelists' works? ______

单选题 Historian: Plato