单选题15. The economy of Colonia has been in recession for the past eight years. Most companies that have not been forced into bankruptcy have survived thanks to the high efficiency of the employees they retained, which helped the companies control costs. In recent months, however, the Colonian economy has begun to recover, and companies are beginning to expand their workforces. Colonia, therefore, will soon experience a drop in average worker efficiency, since ______. Which of the following, if true, most logically complete the argument? ______

单选题12. In Stanton the average number of people injured per automobile accident is consistently higher for accidents involving a taxicab than for those not involving a taxicab. Although all Stanton taxicabs are equipped with passenger seat belts, taxicab drivers reporter that passengers tend not to use them. It is likely, therefore, that if taxicab passengers were required to use seat belts, the number of people injured per accident would soon be no higher for taxicabs than for other automobiles. Which of the following, if true about Stanton, most seriously weakens the argument? ______

单选题 ①Because the subject matter was so personal

单选题11. Stone Age potters crafted complicated and often delicate ceramic pots, tools, and jewel. They also crafted crude pottery figurines. Many of the delicate ceramic pots, tools, and jewelry have been found intact or nearly so, whereas the figurines, crafted at roughly the same time as the ceramics, have largely been found in tiny fragments. Which of the following, if true, best explains why few of the pottery figurines, but many of the delicate ceramics, have been found intact? ______

单选题 ①Early in the twentieth century

单选题xy＜0, yz＜0Quantity A: xzQuantity B: 0

单选题. ①Observations of social play in several species of mammals indicate that individuals often depart from the usual social conventions by, for example, alternating dominant and subordinate positions in ways that do not occur outside the play context. ②Some researchers have even suggested that individuals must follow a 50:50 rule during dyadic play (play between two individuals), so that each participant wins an equal proportion of play encounters. ③Commonly cited cooperative tactics used to equalize play include self-handicapping (participants make themselves more vulnerable to attacks by their opponents) and role reversal (individuals that are dominant in the nonplay context appear subordinate during play). ④Where such tactics occur among unevenly matched opponents, they appear to facilitate play by making play more appealing to the less advantaged player. ①When Bauer and Smuts set out to study play behavior in domestic dogs, they made several predictions. ②They expected to find no significant sex differences in dogs' play behavior. ③The motor skills dogs use in play fighting parallel those used in nonplayful aggression and hunting, areas in which dogs ' behavior is relatively undifferentiated by sex. ④They also predicted that the advantages imparted by larger relative size, by the experience of age, and by higher dominance status would affect dogs' dyadic play. ⑤Existing research on a variety of animal species suggests that individuals with such advantages often refrain from attacks and pursuits or engage in self-handicapping so as not to intimidate their play partners. ⑥If this held true for dogs, larger, older, more dominant dogs would show more self-handicapping than their partners. ⑦But Bauer and Smuts predicted instead that dogs would deviate from the hypothetical 50:50 rule, with advantaged individuals retaining their positions by performing the majority of attacks and pursuits and engaging in fewer self-handicapping behaviors than their partners, thus reinforcing existing hierarchies. ① Bauer and Smuts' three-year study of dogs' dyadic play found that most dyads showed some degree of asymmetry (one dog winning more encounters than the other) and some dyads showed complete asymmetry. ②They also found that in general, older dogs performed more attacks and pursuits and that younger dogs engaged in more self-handicapping. ③Role reversal between dominant and subordinate individuals varied widely: several dyads never reversed dominance roles, a few reversed them frequently, and most reversed them occasionally. ①Bauer and Smuts' finding about asymmetry in dyadic play has several implications. ②First, it indicates that active self-handicapping and role reversals are not necessarily required for play to occur. ③Indeed, play often continued at length even when one partner always won. ④Second, since frequent role reversals occurred, it appears that normal status asymmetries are often significantly more relaxed in the play context. ⑤This suggests that role reversals, while not always necessary, probably do facilitate play.23. The primary purpose of the passage is to ______

单选题25. One of the legends that has been attached to the nineteenth-century writer Edgar Allan Poe is that he was addicted to morphine. Poe discussed virtually every known aspect of his life in his letters. However, nowhere in his voluminous correspondence does he mention his reputed morphine addiction. On the basis of this evidence, it is safe to conclude that reports of his supposed addiction are untrue. Which of the following is an assumption on which the argument depends? ______

单选题. ①Historian Colin Calloway argues that in the late colonial period preceding the American Revolution (1775-1783), the British government sought to seal off territory west of the Appalachian Mountain from the encroachment of land-hungry White settlers, to negotiate with Native American peoples as independent foreign states, and to guarantee the integrity of traditional native American hunting grounds. ②By contrast, White Americans, released by the out break of the Revolution from the constraints of Britain's allegedly benevolent policies, are portrayed by Calloway as ruthless land-grabbers whose new national government endorsed their rapacity. ③Bernard Bailyn argues, however, that the "Americans" who encroached on Native American land during the Revolution had been British only a few years before. ④When, during and after the Revolution, White Americans seized Native American land by any available means, they were continuing a tradition dating back to the earliest years of English settlement in North America. ⑤And, according to Bailyn, the British government's prewar efforts to preserve the trans-Appalachian west for Native Americans resulted not from humanitarian virtue or ethnic tolerance but from British Merchants' desire to maintain their lucrative trade with native Americans and the government's desire to control immigration and avoid costly conflict between White and Native Americans over land.38. The primary purpose of the passage is to ______

单选题If the two roots of the equation 2x2-mx-k-m=0 are 6 and 2，what is the value of k?

单选题. ①Although Klezmer—a style of traditional Jewish folk music from Eastern Europe—grew from very diverse musical traditions, Roma(Gypsy), Greek, and Romanian elements eventually became so predominant that some scholars refused to recognized klezmer as a separate genre. ②If one listens closely, however, one can learn to distinguish the sound of a Klezmer interpretation from other related performance styles. ③Yiddish-speaking Jews routinely use several uniquely descriptive words to identify the sounds found in the Jewish approach to music. ④Krekht(Yiddish for "groan")refers to a wailing sound reminiscent of weeping, tshok refers to a laugh-like instrumental sound; and a kneytsh is a sob-like "catch". ⑤These and other elements typical of klezmer are also found in other forms of Jewish musical expression, including cantorial music.24. Which of the following can be inferred from the passage about Roma, Greek, and Romanian music? ______

单选题在某个实验的结果中，-5出现5次，-4出现4次，-3出现3次，-2出现2次，-1出现1次，0出现1次，那么这个结果的median是多少?

单选题如果M和N被6除得到的余数分别为3和5，那么下面哪一个不可能为M+N的值?

单选题What is the least positive integer that is divisible by each of the integers 1 through 10, inclusive?

单选题 ①From 1910 to 1913

单选题. ①Modern feminism has brought the reputation of the English writer Mary Wollstonecraft (1759-1797) to something approaching the luster it deserves. ②While 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. ③When, 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. ④Wollstonecraft's advances in moral thinking still have the power to shock position-takers of every party. ⑤The 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 shared morality of men and women should cut across all specifications of gender. ①Wollstonecraft 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). ②In her view, there ought to be one criterion of morals for men and women alike, with both sexes cultivating the same virtues. ③Wollstonecraft 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. ①In The Rights of Men, Wollstonecraft explores this double standard from an unexpected angle. ②It 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. ③A defender of Burke called Wollstonecraft's book an incoherent mass of treacherous candour, interested generosity, and, if not false, at least unnecessary accusation. ④But Wollstonecraft nonetheless managed to show how the traditionally feminine virtues of sentimental morality had been transferred by Burke to the aristocracy. ⑤Burke'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. ⑥Like 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. ⑦To 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.50. By quoting Burke's defender in the highlighted phrase, the author of the passage most clearly succeeds in ______

单选题What is the least number of digits including repetitions needed to express 1.23456789×10200 in decimal notation?

单选题the average of three positive integers x, y and z is an odd integerQuantity A: the remainder when x+yz is divided by 2Quantity B: the remainder when x+zy is divided by 2

单选题8. Geographers and historians have traditionally held the view that Antarctica was first sighted around 1820, but some sixteenth-century European maps show a body that resembles the polar landmass, even though explorers of the period never saw it. Some scholars, therefore, argue that the continent must have been discovered and mapped by the ancients, whose maps are known to have served as models for the European cartographers. Which of the following, if true, is most damaging to the inference drawn by the scholars? ______