What do we learn from the last paragraph、

试卷相关题目

• 1A team of scientists has

  A.erected a pressure-releasing pipe in the lake

  B.identified the gases at the bottom of the lake

  C.built a beautiful fountain near the lakes

  D.removed all dangerous gases from the lakes

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• 2Lake Nyos and Lake Monoun explode because

  A.the gases rise to the top and mix with air．

  B.people from the villages turn over the water．

  C.scientists have put in a computer system．

  D.they have more gases trapped at the bottom than other crater lakes

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• 3Which of the following statements about Lake Nyos and Lake Monoun is true、

  A.They were formed in 1984．

  B.They are at the top of two active volcanoes．

  C.They are not like most other crater lakes．

  D.Water in them turns over regularly．

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• 4What will happen when Lake Nyos and Lake Monoun explode、

  A.Water will flow down the hills

  B.Poisonous gases will be released suddenly．

  C.strong wind will rise from the lakes

  D.The volcanoes will come to life．

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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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