31 On a clear night．people can see
A 150 stars
B hundreds of stars
C one thousand stars
D more than 14,000 stars
32 Light 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
33 Nowadays 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 fights．
C these areas are not polluted by chemicals
D these areas are less developed
34 How 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
35 The 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
2017年职称英语考试理工类C级模拟（9）.doc
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