2011年职称英语考试理工类C级模拟(8)

2011年职称英语考试理工类C级模拟(8) #

第4部分：阅读理解(第31～45题，每题3分，共45分) #

下面有3篇短文.每篇短文后有5道题，请根据短文内容，为每题确定1个最佳选项。

第一篇Light Night.Dark Stars

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Thousands of people around the globe step outside to gaze at their night sky On a

clear night.with no clouds，moonlight，or artificial lights to block the view，people can see #

more than 14，000 stars in the sky，says Dennis Ward.an astronomer(天文学家)with the

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University Corporation for Atmospheric Research(UCAR)in Boulder.Cole But when

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people are surrounded by city lights，he says，they’re lucky to see 150 stars. #

If you’ve ever driven toward a big city at night and seen its glow from a great

distance，you’ve witnessed light pollution It occurs when light from streetlights.office

buildings，signs，and other sources streams into space and illuminates(照亮)the night

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sky This haze(朦胧)of light makes many stars invisible to people on Earth Even at

night.big cities like New York glow from light pollution，making stargazing difficult

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Dust and particles of pollution from factories and industries worsen the effects of

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light pollution“If ore city has a lot more light pollution than another.”Ward says，"that city #

will suffer the effects of light pollution on a much greater scale” #

Hazy skies also make it far more difficult for astronomers to do their jobs

Cities are getting larger Suburbs are growing in once dark rural areas Light from all #

this new development is increasingly obscuring(使变模糊)the faint(微弱的)light given #

off by distant stars And if scientists can’t locate these objects they can’t learn more

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about them #

Light pollution doesn’t only affect star visibility It can harm wildlife too It's clear that

artificial light can attract animals，making them go off course There’s increasing #

evidence，for example，that migrating(迁徙)birds use sunsets and sunrises to help find

their way.says Sydney Gauthreaux Jr.a scientist at Clemson University in South #

Carolina. “When light occurs at night，”he says，“it has a very disruptive(破坏性的)

Influence.” Sometimes birds fly into lighted towers high-rises and cables from radio and #

television towers Experts estimate that millions of birds die this way every year. #