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GRE阅读考试模拟题及答案解析(7)

2016-03-10 18:39:47来源:网络

  P2

  1

  The molecules of carbon dioxide in the Earth‘s atmosphere affect the heat balance of the Earth by acting as a one-way screen.

  地球大气层中的二氧化碳分子如同一个单向屏障,影响着地球的热平衡。

  2

  Although these molecules allow radiation at visible wavelengths, where most of the energy of sunlight is concentrated, to pass through, they absorb some of the longer-wavelength, infrared emissions radiated from the Earth‘s surface, radiation that would otherwise be transmitted back into space.

  尽管这些分子允许那些集中了阳光大部分能量的,波长为可见光范围的辐射通过,却吸收了一些地球表面发出的长波红外辐射,防止它们逸散到太空。

  3

  For the Earth to maintain a constant average temperature, such emissions from the planet must balance incoming solar radiation.

  为了让地球保持持续的平均气温,这些地球发出的辐射必须平衡来自太阳的辐射。

  4

  If there were no car-bon dioxide in the atmosphere, heat would escape from the Earth much more easily.

  如果没有大气中的二氧化碳,地球的热量将更轻易地散失。

  5

  The surface temperature would be so much lower that the oceans might be a solid mass of ice. (120 words)

  地表温度将大大降低,直至大洋全部结冰。

  3. According to the passage, the greatest part of the solar energy that reaches the Earth is

  (A) concentrated in the infrared spectrum

  (B) concentrated at visible wavelengths

  (C) absorbed by carbon dioxide molecules

  (D) absorbed by atmospheric water vapor

  (E) reflected back to space by snow and ice

  选B

  见句 2 ,these molecules allow radiation at visible wavelengths, where most of the energy of sunlight is concentrated, to pass through

  For the following question, consider each of the choices separately and select all that apply

  4. According to the passage, atmospheric carbon dioxide performs which of the following functions

  □A absorbing radiation at visible wavelengths

  □B absorbing outgoing radiation from the Earth

  □C helping to retain heat near the Earth‘s surface

  选BC

  祈祷每一种神灵使每一篇阅读做起来这么愉快。

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