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题库总题数 9563
做题总人数 122407
平均每天做题人数 2328
  • OG18自测章 题目总数:101 做题总人数:2220 平均准确率:65.5%

    自测章作为每本OG必带内容,是GMAT考生了解考试内容,考试题型和自我检测的重要部分,建议GMAT考生在正式刷OG之前先做自测章题目。

    • 【句子改错SC】-15761 -OG18自测章

      As an actress and, more importantly, as a teacher of acting, Stella Adler was one of the most influential artists in the American theater, who trained several generations of actors including Marlon Brando and Robert De Niro.

      来源: 282人已做 600难度 27%正确率

    • 【逻辑CR】-15760 -OG18自测章

      Prolonged spells of hot, dry weather at the end of the grape-growing season typically reduce a vineyard’s yield, because the grapes stay relatively small. In years with such weather, wine producers can make only a relatively small quantity of wine from a givenarea of vineyards. Nonetheless, in regions where wine producers generally grow their own grapes, analysts typically expect a long, hot, dry spell late in the growing season to result in increased revenues for local wine producers.Which of the following, if true, does most to justify the analysts' expectation?

      来源: 201人已做 其他难度 76.1%正确率

    • 【逻辑CR】-15759 -OG18自测章

      In the past, most children who went sledding in the winter snow in Verland used wooden sleds with runners and steering bars. Ten years ago, smooth plastic sleds became popular; they go faster than wooden sleds but are harder to steer and slow. The concern that plastic sleds are more dangerous is clearly borne out by the fact that the number of children injured while sledding was much higher last winter than it was 10 years ago.Which of the following, if true in Verland, most seriously undermines the force of the evidence cited?

      来源: 197人已做 其他难度 55.3%正确率

    • 【逻辑CR】-15758 -OG18自测章

      Metal rings recently excavated from seventh-century settlements in the western part of Mexico were made using the same metallurgical techniques as those used by Ecuadorian artisans before and during that period. These techniques are sufficiently complex to make their independent development in both areas unlikely. Since the people of these two areas were in cultural contact, archaeologists hypothesize that the metallurgical techniques used to make the rings found in Mexico were learned by Mexican artisans from Ecuadorian counterparts.Which of the following would it be most useful to establish in order to evaluate the archaeologists’ hypothesis?

      来源: 191人已做 其他难度 57.1%正确率

    • 【逻辑CR】-15757 -OG18自测章

      Following several years of declining advertising sales, the Greenville Times reorganized its advertising sales force. Before reorganization, the sales force was organized geographically, with some sales representatives concentrating on city-center businesses and others concentrating on different outlying regions. The reorganization attempted to increase the sales representatives’ knowledge of clients’ businesses by having each sales representative deal with only one type of industry or of retailing. After the reorganization, revenue from advertising sales increased.In assessing whether the improvement in advertising sales can properly be attributed to the reorganization, it would be most helpful to find out which of the following?

      来源: 203人已做 其他难度 34.5%正确率

    • 【逻辑CR】-15756 -OG18自测章

      Motorists in a certain country frequently complain that traffic congestion is much worse now than it was 20 years ago. No real measure of how much traffic congestion there was 20 years ago exists, but the motorists’ complaints are almost certainly unwarranted. The country’s highway capacity has tripled in the last twenty years, thanks to a vigorous highway construction program, whereas the number of automobiles registered in the country has increased by only 75 percent.Which of the following, if true, most seriously weakens the argument?

      来源: 181人已做 其他难度 75.7%正确率

    • 【逻辑CR】-15755 -OG18自测章

      The percentage of households with an annual income of more than $40,000 is higher in Merton County than in any other county. However, the percentage of households with an annual income of $60,000 or more is higher in Sommer County.If the statements above are true, which of the following must also be true?

      来源:破解版12 、精选题库 178人已做 其他难度 73%正确率

    • 【逻辑CR】-15754 -OG18自测章

      Tiger beetles are such fast runners that they can capture virtually any nonflying insect. However, when running toward an insect, a tiger beetle will intermittently stop and then, a moment later, resume its attack. Perhaps the beetles cannot maintain their pace and must pause for a moment's rest; but an alternative hypothesis is that while running, tiger beetles are unable to adequately process the resulting rapidly changing visual information and so quickly go blind and stop.Which of the following, if discovered in experiments using artificially moved prey insects, would support one of the twohypotheses and undermine the other?

      来源: 186人已做 其他难度 35.5%正确率

    • 【逻辑CR】-15753 -OG18自测章

      Guillemots are birds of Arctic regions. They feed on fish that gather beneath thin sheets of floating ice, and they nest on nearby land. Guillemots need 80 consecutive snow-free days in a year to raise their chicks, so until average temperatures in the Arctic began to rise recently, the guillemots’ range was limited to the southernmost Arctic coast. Therefore, if the warming continues, the guillemots’ range will probably be enlarged by being extended northward along the coast.Which of the following, if true, most seriously weakens the argument?

      来源: 200人已做 其他难度 41%正确率

    • 【逻辑CR】-15752 -OG18自测章

      Some batches of polio vaccine used around 1960 were contaminated with SV40, a virus that in monkeys causes various cancers. Some researchers now claim that this contamination caused some cases of a certain cancer in humans, mesothelioma. This claim is not undercut by the fact that a very careful survey made in the 1960s of people who had received the contaminated vaccine found no elevated incidence of any cancer, since ___________.

      来源: 173人已做 其他难度 74.6%正确率

最新讨论题目
  • 【逻辑CR】

    In parts of South America, vitamin-A deficiency is a serious health problem, especially among children. In one region, agriculturists hope to improve nutrition by encouraging farmers to plant a new variety of sweet potato called SPK004 that is rich in betacarotene, which the body converts into vitamin A. The plan has good chances of success, since sweet potato is a staple of the region’s diet and agriculture, and the varieties currently grown contain little beta-carotene. Which of the following, if true, most strongly supports the prediction that the plan will succeed?  

  • 【阅读RC】

    Which of the following is included in the discussion of the cursorial hypothesis but not in the discussion of the arboreal hypothesis?

  • 【逻辑CR】

    It is illegal to advertise prescription medications in Hedland except directly to physicians, either by mail or in medical journals.  A proposed law would allow general advertising of prescription medications.  Opponents object that the general population lacks the specialized knowledge to evaluate such advertisements and might ask their physicians for inappropriate medications.  But since physicians have the final say as to whether to prescribe a medication for a patient, inappropriate prescriptions would not become more common. Which of the following would it be most useful to establish in order to evaluate the argument?

  • 【逻辑CR】

    【OG20-P595-717题】Which of the following most logically completes the passage?According to the last pre-election poll in Whippleton, most voters believe that the three problems government needs to address, in order of importance, are pollution, crime, and unemployment. Yet in the election, candidates from parties perceived as strongly against pollution were defeated, while those elected were all from parties with a history of opposing legislation designed to reduce pollution.These results should not be taken to indicate that the poll was inaccurate, however, since __________

  • 【逻辑CR】

    【OG20-P594-715题】Several industries have recently switched at least partly from older technologies powered by fossil fuels to new technologies powered by electricity. It is thus evident that less fossil fuel is being used as a result of the operations of these industries than would have been used if these industries had retained their older technologies.Which of the following, if true, most strengthens the argument above? 

  • 【句子改错SC】

    In July 1965 Mariner IV passed by Mars and took the first-ever close-up photographs of another planet, which showed that the Martian surface was like that of the Moon's in that it was pockmarked by moonlike craters and was dry and apparently dead.

  • 【逻辑CR】

    A survey of entrepreneurs who started companies last year shows that while virtually all did substantial preparatory research and planning, only half used that work to produce a formal business plan.  Since, on average, the entrepreneurs without formal plans secured the capital they needed in half the time of those with plans, these survey results indicate that, in general, formal plans did not help the entrepreneurs who produced them to secure the capital they needed. Which of the following, if true, most seriously weakens the argument?

  • 【问题求解PS】

    【OG20-P181-230题】The value of   is how many times the value of 2-17?

  • 【句子改错SC】

    To Josephine Baker, Paris was her home long before it was fashionable to be an expatriate, and she remained in France during the Second World War as a performer and an intelligence agent for the Resistance. 

  • 【阅读RC】

    【OG20-P459-606题】The author of the passage mentions "escape velocity"  in order to help explain which of the following?

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