职称英语职称英语理工类2009年职称英语等级考试试题理工类C

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• 21When an organism dies， the C-14 in it begins to decay.

  A.Right

  B.Wrong

  C.Not mentioned

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• 22The half-life of C-14 is about 25，000 years.

  A.Right

  B.Wrong

  C.Not mentioned

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• 23On a clear night， people can see

  A.150 stars.

  B.hundreds of stars.

  C.one thousand stars.

  D.more than 14，000 stars.

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• 24Light pollution occurs when

  A.artificial lights illuminate the night sky.

  B.the moon lights up the night sky.

  C.too many stars are visible in the night sky

  D.streetlights are turned off.

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• 25Nowadays even suburbs are becoming unsuitable for scientists to do their jobs because

  A.the night sky there is too dark.

  B.the once dark areas are also polluted by lights.

  C.these areas are not polluted by chemicals.

  D.these areas are less developed.

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• 26How does light pollution affect wildlife？

  A.Animals may go off course.

  B.It helps migrating birds find their homes.

  C.Animals are afraid to go out after sunset.

  D.It helps birds fall asleep.

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• 27The title “Light Night， Dark Stars” means

  A.the night sky is brightly lit up and stars are black.

  B.lights appear at night and stars are seen in the dark.

  C.city lights at night illuminate stars in the sky.

  D.city lights illuminate the night sky， making stars invisible

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• 28Which statement about Barth is NOT true？

  A.He is 33 years old now.

  B.He works at a Goodwill thrift shop.

  C.He works at a Salvation Army thrift shop.

  D.He was a college student many years ago

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• 29When Barth was a college student， he often shopped at thrift shops

  A.to save money.

  B.to save energy.

  C.to help the environment.

  D.to make friends with poor peopl

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• 30What does Akins do？

  A.She is a soldier.

  B.She is an accountant.

  C.She is a saleswoman

  D.She is a road sweeper.

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