The only way to stop the spread of aerosols in the atmosphere, according to Dr. Rasool and Dr. Schneider, is to use________.

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• 1What will happen if the dust aerosol layer develops、

  A.The Earth will get extremely hot.

  B.The balance between the amount of heat absorbed from the Sun and the amount　lost could hardly be maintained.

  C.The light of the Sun could no longer reach the surface of the Earth.

  D.C.The light of the Sun could no longer reach the surface of the Earth.D.Infrared radiation could no longer be transmitted from the Earth to outer spac

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• 2We learn from the third paragraph that________.

  A.London was plagued with rats in the 1950s

  B.London is covered with smog today

  C.London was polluted by smog in the 1950s

  D.Los Angeles is as heavily polluted today as London was in the 1950s

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• 3The word "specters" in the second paragraph is closest in meaning to________.

  A.pollution.

  B.carbon dioxide

  C.aerosols

  D.ghosts

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• 4The author's main purpose in writing the article is to warn of________.

  A.warm weather

  B.hot weather

  C.a new ice age

  D.a new iceberg

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• 5The computer performed better than people in the study because________.

  A.the computer worked harder

  B.the computer was not busy

  C.people tended to be biased

  D.people were not good at statistics

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