课程咨询
扫码关注掌握一手留学资讯

扫码关注掌握一手留学资讯

回复XDF免费领

水平测试和备考资料

扫码关注公众号

GRE阅读题目解析:地球大气层中的二氧化碳

2017-03-16 09:44:00来源:网络

  GRE阅读题目解析:地球大气层中的二氧化碳】GRE考试考什么?GRE阅读是重点。新东方在线GRE频道为大家带来GRE阅读题目解析:地球大气层中的二氧化碳,答案见下一页,希望对大家GRE备考有所帮助。更多精彩尽请关注新东方在线GRE频道!

  查看全部:GRE阅读答案解析(汇总)

  GRE阅读题目解析:地球大气层中的二氧化碳

  P2

  The molecules of carbon dioxide in the Earth‘s atmosphere affect the heat balance of the Earth by acting as a one-way screen. 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. For the Earth to maintain a constant aver age temperature, such emissions from the planet must balance incoming solar radiation. If there were no car-bon dioxide in the atmosphere, heat would escape from the Earth much more easily. The surface temperature would be so much lower that the oceans might be a solid mass of ice. (120 words)

  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

  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

  点击下一页查看答案:

本文关键字: GRE阅读 GRE阅读真题

添加新东方美研助教回复【GRE】获取

模考真题|写作题库|阅读机经|佛脚词汇

更多资料
更多>>
更多内容

关注新东方美研助教

回复【GRE】获取备考必看资料包

新东方美研备考资料
更多>>
更多惊喜>>
更多>>
更多资料