英語翻譯
Data from the pioneer spacecraft of the National Aeronautics and Space Administration(NASA) apparently prove the theory that the 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,warmsits 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 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.
32.According to the passage,what happens to heat radiation Venus?
A.It is neutralized at the planet’s surface.B.It creates energy.
C.It is trapped by the atmosphere.D.It circulates evenly.
34.From the passage it can be inferred that the burning of fossil fuel on Earth may cause _____.A.more carbon dioxide to enter sea water B.the planet’s temperature to change
C.more sunlight to reach the Earth’s surface D.the atmosphere to become thinner
35.According to the passage,data from the Venus study can be used to ______.
A.predict changes in the planet’s orbit
B.predict future agricultural problems on Earth
C.test the efficiency of a spacecraft
D.test a theory about more efficient greenhouse
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