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GRE阅读题目解析:星空中的黯淡区域

2017-03-06 18:30:00来源:网络

  P1

  1

  The dark regions in the starry night sky are not pockets in the universe that are devoid of stars as had long been thought.

  一直以来,人们以为星空中的黯淡区域好像宇宙中没有星星的口袋,事实并非如此。

  2

  Rather, they are dark because of interstellar dust that hides the stars behind it.

  相反,这种黯淡是因为星际尘埃遮蔽了其后的星光。

  3

  Although its visual effect is so pronounced, dust is only a minor constituent of the material, extremely low in density, that lies between the stars.

  尽管尘埃的遮蔽效果如此明显,但它在宇宙中只占非常小的比例,在星际间的密度极低。

  4

  The average density of interstellar material in the vicinity of our Sun is 1,000 to 10,000 times less than the best terrestrial laboratory vacuum.

  太阳附近区域星际间物质的密度,只相当于地球上能达到的实验室真空状态的万分之一到千分之一。

  5

  It is only because of the enormous interstellar distances that so little material per unit of volume becomes so significant.

  每单位体积内如此微量的物质的作用却如此明显,只因巨大的星际间距。

  6

  Optical astronomy is most directly affected, for although interstellar gas is perfectly transparent, the dust is not. (125 words)

  受其影响最大的是光学观测,因为即便星云能够看透星云,也无法对付尘埃。

  1. According to the passage, which of the following is a direct perceptual consequence of interstellar dust EXCEPT?

  □A Some stars are rendered invisible to observers on Earth.

  □B Many visible stars are made to seem brighter than they really are.

  □C The dust is conspicuously visible against a background of bright stars.

  选 BC

  仅根据文中信息有限推测

  perceptual 感性的,perceptual consequence of interstellar dust 星际尘埃给人造成的感受。

  A 成立,只要足够远,不选

  B 根据文章信息,无法判断是否看起来更亮。

  C 新内容,且不靠谱,如果人能分辨出星际尘埃,就不会在开篇说那些黯淡的区域像 pockets in the universe 了。

  2. It can be inferred from the passage that it is because space is so vast that

  (A) little of the interstellar material in it seems substantial

  (B) normal units of volume seem futile for measurements of density

  (C) stars can be far enough from Earth to be obscured even by very sparsely distributed matter

  (D) interstellar gases can, for all practical purposes, be regarded as transparent

  (E) optical astronomy would be of little use even if no interstellar dust existed

  选 C

  根据在句 5:

  It is only because of the enormous interstellar distances that so little material per unit of volume becomes so significant.

  以上就是新东方在线GER频道为你带来的GRE阅读题目解析:星空中的黯淡区域,更多精彩敬请关注新东方在线GRE频道。

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