中间图

Or

雷哥网GMAT题库 我们不一样 考生可终身免费使用

题库总题数 9563
做题总人数 124746
平均每天做题人数 2314
  • GWD–TN24套 题目总数:2172 做题总人数:23172 平均准确率:71.3%

    源自GMAT GWD真题库,是参考往年流传的一些考试真题整理而成,帮助你了解一些经典难题,GWD部分题目过于勉强,因此建议大家作为备考辅助练习使用,主要用于练习pace即可。

    • 【阅读RC】-15558 -GWD–TN24套

      A small number of the forest species of lepidoptera (moths and butterflies, which exist as caterpillars during most of their life cycle) exhibit regularly recurring patterns of population growth and decline—such fluctuations in population are known as population cycles. Although many different variables influence population levels, a regular pattern such as a population cycle seems to imply a dominant, driving force. Identification of that driving force, however, has proved surprisingly elusive despite considerable research. The common approach of studying causes of population cycles by measuring the mortality caused by different agents, such as predatory birds or parasites, has been unproductive in the case of lepidoptera. Moreover, population ecologists' attempts to alter cycles by changing the caterpillars' habitat and by reducing caterpillar populations have not succeeded. In short, the evidence implies that these insect populations, if not self-regulating, may at least be regulated by an agent more intimately connected with the insect than are predatory birds or parasites.Recent work suggests that this agent may be a virus.For many years, viral disease had been reported in declining populations of caterpillars, but population ecologists had usually considered viral disease to have contributed to the decline once it was underway rather than to have initiated it. The recent work has been made possible by new techniques of molecular biology that allow viral DNA to be detected at low concentrations in the environment. Nuclear polyhedrosis viruses are hypothesized to be the driving force behind population cycles in lepidoptera in part because the viruses themselves follow an infectious cycle in which, if protected from direct sun light, they may remain virulent for many years in the environment, embedded in durable crystals of polyhedrin protein. Once ingested by a caterpillar, the crystals dissolve, releasing the virus to infect the insect's cells. Late in the course of the infection, millions of new virus particles are formed and enclosed in polyhedron crystals. These crystals reenter the environment after the insect dies and decomposes, thus becoming available to infect other caterpillars.One of the attractions of this hypothesis is its broad applicability. Remarkably, despite significant differences in habitat and behavior, many species of lepidoptera have population cycles of similar length, between eight and eleven years. Nuclear polyhedrosis viral infection is one factor these disparate species share."

      来源:GWD–TN24套 、精选题库 530人已做 700难度 78.9%正确率

    • 【阅读RC】-15557 -GWD–TN24套

      A small number of the forest species of lepidoptera (moths and butterflies, which exist as caterpillars during most of their life cycle) exhibit regularly recurring patterns of population growth and decline—such fluctuations in population are known as population cycles. Although many different variables influence population levels, a regular pattern such as a population cycle seems to imply a dominant, driving force. Identification of that driving force, however, has proved surprisingly elusive despite considerable research. The common approach of studying causes of population cycles by measuring the mortality caused by different agents, such as predatory birds or parasites, has been unproductive in the case of lepidoptera. Moreover, population ecologists' attempts to alter cycles by changing the caterpillars' habitat and by reducing caterpillar populations have not succeeded. In short, the evidence implies that these insect populations, if not self-regulating, may at least be regulated by an agent more intimately connected with the insect than are predatory birds or parasites.Recent work suggests that this agent may be a virus.For many years, viral disease had been reported in declining populations of caterpillars, but population ecologists had usually considered viral disease to have contributed to the decline once it was underway rather than to have initiated it. The recent work has been made possible by new techniques of molecular biology that allow viral DNA to be detected at low concentrations in the environment. Nuclear polyhedrosis viruses are hypothesized to be the driving force behind population cycles in lepidoptera in part because the viruses themselves follow an infectious cycle in which, if protected from direct sun light, they may remain virulent for many years in the environment, embedded in durable crystals of polyhedrin protein. Once ingested by a caterpillar, the crystals dissolve, releasing the virus to infect the insect's cells. Late in the course of the infection, millions of new virus particles are formed and enclosed in polyhedron crystals. These crystals reenter the environment after the insect dies and decomposes, thus becoming available to infect other caterpillars.One of the attractions of this hypothesis is its broad applicability. Remarkably, despite significant differences in habitat and behavior, many species of lepidoptera have population cycles of similar length, between eight and eleven years. Nuclear polyhedrosis viral infection is one factor these disparate species share."

      来源:GWD–TN24套 、破解版07 、Manhattan 、破解版08 、破解版12 、精选题库 、测评题 656人已做 700难度 60.1%正确率

    • 【阅读RC】-15556 -GWD–TN24套

      A small number of the forest species of lepidoptera (moths and butterflies, which exist as caterpillars during most of their life cycle) exhibit regularly recurring patterns of population growth and decline—such fluctuations in population are known as population cycles. Although many different variables influence population levels, a regular pattern such as a population cycle seems to imply a dominant, driving force. Identification of that driving force, however, has proved surprisingly elusive despite considerable research. The common approach of studying causes of population cycles by measuring the mortality caused by different agents, such as predatory birds or parasites, has been unproductive in the case of lepidoptera. Moreover, population ecologists' attempts to alter cycles by changing the caterpillars' habitat and by reducing caterpillar populations have not succeeded. In short, the evidence implies that these insect populations, if not self-regulating, may at least be regulated by an agent more intimately connected with the insect than are predatory birds or parasites.Recent work suggests that this agent may be a virus.For many years, viral disease had been reported in declining populations of caterpillars, but population ecologists had usually considered viral disease to have contributed to the decline once it was underway rather than to have initiated it. The recent work has been made possible by new techniques of molecular biology that allow viral DNA to be detected at low concentrations in the environment. Nuclear polyhedrosis viruses are hypothesized to be the driving force behind population cycles in lepidoptera in part because the viruses themselves follow an infectious cycle in which, if protected from direct sun light, they may remain virulent for many years in the environment, embedded in durable crystals of polyhedrin protein. Once ingested by a caterpillar, the crystals dissolve, releasing the virus to infect the insect's cells. Late in the course of the infection, millions of new virus particles are formed and enclosed in polyhedron crystals. These crystals reenter the environment after the insect dies and decomposes, thus becoming available to infect other caterpillars.One of the attractions of this hypothesis is its broad applicability. Remarkably, despite significant differences in habitat and behavior, many species of lepidoptera have population cycles of similar length, between eight and eleven years. Nuclear polyhedrosis viral infection is one factor these disparate species share."

      来源:GWD–TN24套 、精选题库 579人已做 700难度 61.5%正确率

    • 【阅读RC】-15555 -GWD–TN24套

      A small number of the forest species of lepidoptera (moths and butterflies, which exist as caterpillars during most of their life cycle) exhibit regularly recurring patterns of population growth and decline—such fluctuations in population are known as population cycles. Although many different variables influence population levels, a regular pattern such as a population cycle seems to imply a dominant, driving force. Identification of that driving force, however, has proved surprisingly elusive despite considerable research. The common approach of studying causes of population cycles by measuring the mortality caused by different agents, such as predatory birds or parasites, has been unproductive in the case of lepidoptera. Moreover, population ecologists' attempts to alter cycles by changing the caterpillars' habitat and by reducing caterpillar populations have not succeeded. In short, the evidence implies that these insect populations, if not self-regulating, may at least be regulated by an agent more intimately connected with the insect than are predatory birds or parasites.Recent work suggests that this agent may be a virus.For many years, viral disease had been reported in declining populations of caterpillars, but population ecologists had usually considered viral disease to have contributed to the decline once it was underway rather than to have initiated it. The recent work has been made possible by new techniques of molecular biology that allow viral DNA to be detected at low concentrations in the environment. Nuclear polyhedrosis viruses are hypothesized to be the driving force behind population cycles in lepidoptera in part because the viruses themselves follow an infectious cycle in which, if protected from direct sun light, they may remain virulent for many years in the environment, embedded in durable crystals of polyhedrin protein. Once ingested by a caterpillar, the crystals dissolve, releasing the virus to infect the insect's cells. Late in the course of the infection, millions of new virus particles are formed and enclosed in polyhedron crystals. These crystals reenter the environment after the insect dies and decomposes, thus becoming available to infect other caterpillars.One of the attractions of this hypothesis is its broad applicability. Remarkably, despite significant differences in habitat and behavior, many species of lepidoptera have population cycles of similar length, between eight and eleven years. Nuclear polyhedrosis viral infection is one factor these disparate species share."

      来源:GWD–TN24套 739人已做 700难度 63.5%正确率

    • 【句子改错SC】-14459 -GWD–TN24套

      Judge Lois Forer's study asks why do some litigants have a preferred status over others in the use of a public resource, the courts, which in theory are available to all but in fact are unequally distributed among rich and poor.

      来源:GWD–TN24套 1229人已做 600难度 73.2%正确率

    • 【逻辑CR】-14450 -GWD–TN24套

      Consumer health advocate:Your candy company adds caffeine to your chocolate candy bars so that each one delivers a specified amount of caffeine. Since caffeine is highly addictive, this indicates that you intend to keep your customers addicted.Candy manufacturer:Our manufacturing process results in there being less caffeine in each chocolate candy bar than in the unprocessed cacao beans from which the chocolate is made.The candy manufacturer's response is flawed as a refutation of the consumer health advocate's argument because it

      来源:GWD–TN24套 1292人已做 600难度 80.3%正确率

    • 【逻辑CR】-14449 -GWD–TN24套

      Since the mayor's publicity campaign for Greenville's bus service began six months ago.morning automobile traffic into the midtown area of the city has decreased seven percent.During the same period, there has been an equivalent rise in the number of persons riding buses into the midtown area.Obviously, the mayor's publicity campaign has convinced many people to leave their cars at home and ride the bus to work.Which of the following, if true, casts the most serious doubt on the conclusion drawn above?

      来源:GWD–TN24套 973人已做 其他难度 85%正确率

    • 【逻辑CR】-14448 -GWD–TN24套

      Which of the following, if true, most logically completes the argument below?Manufacturers are now required to make all cigarette lighters child-resistant by equipping them with safety levers. But this change is unlikely to result in a significant reduction in the number of fi res caused by children playing with lighters, because children given the opportunity can figure out how to work the safety levers and_____.

      来源:GWD–TN24套 1098人已做 600难度 91.9%正确率

    • 【逻辑CR】-14447 -GWD–TN24套

      A bakery estimates its predicted yearly expenditures on ingredients when allocating its annual food budget by adding a correction factor of five percent to its costs from the previous year. This method allows the bakery to quickly and simply account for annual increases in the cost of raw ingredients.Which of the following, if true, would most call into question the economic soundness of the bakery's method for estimating its food budget?

      来源:GWD–TN24套 991人已做 600难度 73.9%正确率

    • 【问题求解PS】-14209 -GWD–TN24套

      43 + 43 + 43 + 43 =

      来源:GWD–TN24套 323人已做 600难度 94.4%正确率

最新讨论题目
  • 【句子改错SC】

    The use of gravity waves, which do not interact with matter in the way electromagnetic waves do, hopefully will enable astronomers to study the actual formation of black holes and neutron stars.

  • 【逻辑CR】

    The amount of time it takes for most of a worker's occupational knowledge and skills to become obsolete has been declining because of the introduction of advanced manufacturing technology (AMT). Given the rate at which AMTis currently being introduced in manufacturing, the average worker's old skills become obsolete and new skills are required within as little as five years. Which of the following plans, if feasible, would allow a company to prepare most effectively for the rapid obsolescence of skills described above?  

  • 【问题求解PS】

    An investment of d dollars at k percent simple annual interest yields $600 interest over a 2-year period.  In terms of d, what dollar amount invested at the same rate will yield $2,400 interest over a 3-year period?

  • 【数据充分DS】

    If a < y < z < b, is |y - a | < |y - b | ?(1) |z - a | < |z - b |(2) |y - a | < |z - b |

  • 【数据充分DS】

    Lines n and p lie in the xy-plane. Is the slope of line n less than the slope of line p ?(1) Lines n and p intersect at the point (5,1). (2) The y-intercept of line n is greater than the y-intercept of line p. 

  • 【数据充分DS】

     In the xy-plane, does the line with equation y = 3x + 2 contain the point (r, s) ? (1) (3r + 2 - s)(4r + 9 - s) = 0 (2) (4r - 6 - s)(3r + 2 - s) = 0 

  • 【句子改错SC】

    【OG20-P794-806题】Over the past ten years cultivated sunflowers have become a major commercial crop, second only to soybeans as a source of vegetable oil. 

  • 【句子改错SC】

    Displays of the aurora borealis, or “northern fights,” can heat the atmosphere over the arctic enough to affect the trajectories of ballistic missiles, induce electric currents that can cause blackouts in some areas and corrosion in north-south pipelines. 

  • 【逻辑CR】

    Fact: Asthma, a bronchial condition, is much less common ailment than hay fever, an allergic inflammation of the nasal passages.Fact: over 95 percent of people who have asthma also suffer from hay fever. If the information given as facts above is true, which of the following must also be true? 

  • 【句子改错SC】

    Data gathered by weather satellites has been analyzed by scientists, reporting that the Earth's northern latitudes have become about ten percent greener since 1980, due to more vigorous plant growth associated with warmer temperatures and higher levels of atmospheric carbon dioxide.

  • 手机注册
  • 邮箱注册
登录>







关闭图标

标题图

  • 图标

    知识库学习

    GMAT语法、逻辑、阅读、数学各单项备考知识点学习及测验
  • 图标

    在线做题

    包含GMAT各单项必考知识点题目、OG/PREP/GWD/雷哥讲义题目、难度650/680/700/730题库题目练习及题目解析
  • 图标

    在线模考

    语文套题/数学套题/全套仿真模考,包含GWD/PERP/精选模考等上百套套题模考
  • 图标

    在线测评

    适合5种不同基础的GMAT学员,测评后可自动出具分数报告及复习计划指导
  • 图标

    资料下载

    GMAT必备备考资料下载、鸡精下载、课程课件等免费下载
  • 图标

    课程学习

    注册会员后,可在GMAT课程区,选择免费直播课程及公开课程进行在线学习
×
请你选择你要查看的模考成绩单
立即开通 暂不开通
加载图片
网络异常