The best title for the selection would be______.

试卷相关题目

• 1For as long as three months of a year, the sun _________on the ice-covered land of Alask

  A.A.

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• 2Genera has increased the number of its employees recently.

  A.Right

  B.Wrong

  C.Not mentioned

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• 3The British government is helping Dr Parton to sell the tests abroad.

  A.Right

  B.Wrong

  C.Not mentioned

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• 4Genera Technologies orders 25 more tests before the end of the year.

  A.Right

  B.Wrong

  C.Not mentioned

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• 5Each of the tests costs $42,500.

  A.Right

  B.Wrong

  C.Not mentioned

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• 6All of the following cause floods EXCEPT______.

  A.heavy rain

  B.melting snow

  C.increasing storm runoff

  D.porous soil

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• 7The author states that______.

  A.lakes and swamps once acted like natural reservoirs

  B.up-and-down hill plowing catches and stores water

  C.stream channels are the best carriers of water

  D.floods are easily prevented and controlled

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• 8According to the selection, streams overtop their banks partly because______.

  A.material from higher land is washed into them

  B.ditches and drains lead into them

  C.rivers become too swift

  D.snow melts more rapidly nowadays

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• 9The floods which are given most publicity______.

  A.cause no damage

  B.cause the most damage

  C.cause less agricultural damage than the many smaller, more frequent floods

  D.far exceed the smaller, more frequent floods in agricultural loss

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• 10According to Leszczynski, how does mobile phone affect one's health、 _________

  A.Mobile phone radiation can increase protein activities and such activities can make the protective shield more permeable.

  B.Mobile phone radiation can shrink the blood vessels and prevent blood from flowing smoothly.

  C.Mobile phone radiation will bring stress to people exposed to it.

  D.Mobile phone radiation kills blood cells at a rapid speed.

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