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GMAT阅读OG 13 26篇详细分析-4

2014-09-23 20:16:08来源:网络

  新东方在线为大家精心整理了GMAT阅读OG 13 26篇详细分析的相关内容,分享给大家,供大家参考,希望对大家有所帮助!

  lo and Europa, the inner two of Jupiter's four largest moons, are about the size of Earth's moon and are composed mostly or entirely of rock and metal. Ganymede and Callisto are larger and roughly half ice. Thus, these four moons are somewhat analogous to the planets of the solar system, in which the rock- and metal-rich inner planets are distinct from the much larger gas- and ice-rich outer planets. Jupiter's moons are, however, more "systematic": many of their properties vary continuously with distance from Jupiter. For example, lo is ice-free, Europa has a surface shell of ice, and while Ganymede and Callisto are both ice-rich, outermost Callisto has more.

  This compositional gradient has geological parallels, lo is extremely geologically active, Europa seems to be active on a more modest scale, and Ganymede has undergone bouts of activity in its geological past. Only Callisto reveals no geological activity. In similar fashion, Callisto's surface is very heavily cratered from the impact of comets and asteroids; Ganymede, like Earth's moon, is heavily cratered in parts; Europa is very lightly cratered; and no craters have been detected on lo, even though Jupiter's gravity [line 25] attracts comets and asteroids passing near it, substantially increasing the bombardment rate of the inner moons compared to that of the outer ones. But because of lo's high degree of geological activity, its surface undergoes more-or-less continuous volcanic resurfacing.

  Questions 11-13 refer to the passage above.

  11. According to the passage, the difference in the amount of cratering on Callisto's and lo's respective surfaces can probably be explained by the difference between these two moons with respect to which of the following factors?

  A. Size

  B. Ice content

  C. The rate of bombardment by comets and asteroids

  D. The influence of Jupiter's other moons

  E. The level of geological activity

  12. Which of the following best describes the purpose of the second paragraph of the passage?

  A. To provide further evidence of the systematic variation in the characteristics of Jupiter's four largest moons

  B. To present a comprehensive theory to explain the systematic variation in the characteristics of Jupiter's four largest moons

  C. To explain the significance of the systematic variation in the characteristics of Jupiter's four largest moons

  D. To introduce facts that contradict conventional assumptions about Jupiter's four largest moons

  E. To contrast the characteristics of Jupiter's four largest moons with the characteristics of the planets of the solar system

  13. The author's reference to Jupiter's gravity in line 25 serves primarily to

  A. indicate why the absence of craters on lo's surface is surprising

  B. explain the presence of craters on the surface of Jupiter's four largest moons

  C. provide an explanation for the lack of geological activity on Callisto

  D. contrast Jupiter's characteristics with the characteristics of its four largest moons

  E. illustrate the similarity between Jupiter's four largest moons and the planets of the solar system

  题材:Astronomy

  类型:现象解释(自然现象)

  框架:Jupiter's four moons

  背景介绍--含冰量--地质活动--撞击(Lo is special)

  冰覆盖:L

  地质活动:C

  撞击率:L

  逻辑链:

  1、介绍J的4个卫星的名字,主要成分,和太阳系类比

  2、卫星的系统性,和距离有关,举例:冰的覆盖率

  3、成分梯度:地质活动程度;撞击率

  4、L的特殊性质

  题目类型:11:细节信息 12:段落结构 13:细节推断

  解题定位(根据OG13解释):

  11:题目绕口,其实就是根据C和L之间什么不同的原因导致了C和L撞击率的不同?看文章内容,C的撞击率最大,L的撞击率最小,L离木星最近,C离木星最远。Line25说,离的近最容易受到彗星撞击,但L的表面很平,因为L的地质活动是最强的,虽然可能受到过撞击,但是因为火山活动导致表面再次变平,所以不是撞击率小,而是地址活动太高,看不出来。而C离的最远,地址活动最小,撞击后无法平整,撞击口就明显了。所以答案选地质活动。

  12:第二段开头This,承上启下,进一步说明

  13:问题提示Line25,但实际想考你Line28,既然inner star容易受到撞击,包括L,但是L表面是最平整的,作者提问这句话的目的,是想说明后面L的例子很surprising

  以上就是新东方在线为大家总结的GMAT阅读OG 13 26篇详细分析的相关内容,最后预祝大家在GMAT考试中取得优异的成绩!


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