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山东师范大学成人高考:济南专升本英语试题6

来源：山东育路网发布时间：2013-08-05[进入论坛][成考常见问题咨询]

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Data from the pioneer spacecraft of the National Aeronautics and Space Administration （NASA） apparently prove the theory that searing 900-degree Fahrenheit surface temperature of Venus is due to an atmospheric greenhouse effect caused mainly by a blanket of carbon dioxide. Such a greenhouse effect is created when energy in the form of sunlight easily passes through a planet's atmosphere， warms its surface， and is converted to heat radiation that is then held in by the atmosphere. The orbiting spacecraft sampled Venus' atmosphere from top to bottom， enabling NASA's scientists to establish the exact amount of sunlight absorbed at various places in the planet's atmosphere and on its surface. Measurements of atmosphere composition， temperature profiles， and radiative heating predicted Venus' surface temperature very accurately. The planet is closer to the Sun than is Earth， and it has a relatively thin atmosphere like Earth's but Venus' atmosphere consists of more than ninety percent carbon dioxide， compared to less than four percent in that of Earth. Because of its higher percentage of carbon dioxide， Venus' atmosphere traps much more heat radiation than does Earth's. Thus， the Venus studies are believed to be important to the understanding of possible adverse effects on Earth's agriculture and sea levels that could result from the long-term use of fossil fuels， which add carbon dioxide to the atmosphere.

（1）。 Which of the following would be the best title for this passage？

A. The Voyage of Pioneer Spacecraft B. Measuring Planetary Temperatures C. A New Theory D. The Greenhouse Effect on Venus

（2）。According to the passage， what heats the atmosphere on Venus？

A. The green house effect B. The sunlight C. The radiation D. The carbon dioxide

（3）。According to the passage， how does the atmosphere of Venus differ from that of Earth？

A. It contains much more carbon dioxide B. It is four percent thinner C. It holds significantly less moisture D. It traps less heat radiation

（4）。It can be inferred from the passage that the burning of fossil fuels on Earth may cause _____.

A. more carbon dioxide to enter sea water B. more sunlight to reach the Earth's surface C. the planet's temperature to change D. the atmosphere to become thinner

（5）。According to the passage， data from the Venus study can be used to ________.

A. predict changes in the planet's orbit B. test a theory about more efficient greenhouse C. test the efficiency of a spacecraft D. predict future agricultural problems on Earth

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