2009年職稱英語理工類c級考試試題及答案

第4部分：閱讀理解（第31～45題，每題3分，共45分）

下面有3篇短文，每篇短文后有5道題。請根據(jù)短文內(nèi)容，為每題確定1個(gè)最佳選項(xiàng)。

第一篇

Light Night, Dark Stars

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 (天文學(xué)家) with the University Corporation for Atmospheric Research (UCAR) in Boulder, Colo. But when 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 (照亮) the night buildings, signs, and other sources streams into space and illuminates ~ sky. This haze (朦朧) 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.

Dust and particles of pollution from factories and industries worsen the effects of light pollution. "If one 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 (使變模糊) the faint (微弱的) light given off by distant stars. And if scientists can't locate these objects, they can't learn more 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 (遷徙) 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 (破壞性的) 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.

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 lights.

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

參考答案：

31 D 32 A 33 B 34 A 35 D

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（責(zé)任編輯：vstara）

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