首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
Light Night, Dark Stars Thousands of people around the globe step outside to gaze at their night sky. On a clear night, with
Light Night, Dark Stars Thousands of people around the globe step outside to gaze at their night sky. On a clear night, with
admin
2013-10-25
69
问题
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 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 buildings, signs, and other sources streams into space and illuminates the night sky. This haze 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 the faint 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 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 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.
Which of the following is NOT correct? .
选项
A、Animals may go off course due to the attraction of artificial lights.
B、Animals might be attracted by artificial lights to go into cities.
C、Artificial lights at night may make migrating birds lose their way.
D、Attracted by artificial lights, birds fly into lighted buildings.
答案
B
解析
题意:以下说法哪个是错误的?第六段最后三句告诉我们人造光源会误导动物而致使它们迷路,但却没有说会将它们引进城市,故本题选B。
转载请注明原文地址:https://kaotiyun.com/show/5Hmd777K
本试题收录于:
职称英语卫生类B级题库职称英语分类
0
职称英语卫生类B级
职称英语
相关试题推荐
Readthefollowingpassageandanswerquestions9-18.1.Peoplehavebeenpaintingpicturesforatleast30,000years.Theearli
Readthefollowingpassageandanswerquestions9-18.1.Mostyoungpeopleenjoysomeformsofphysicalactivity.Itmaybewalk
Readthefollowingpassageandanswerquestions9-18.1.Mostyoungpeopleenjoysomeformsofphysicalactivity.Itmaybewalk
Youwillhearfivepeoplegivingtheiropinionsonchanginginlife.Forquestions9-13,choosefromthelistA~Fwhateach
Youwillhearfivepeoplegivingtheiropinionsonchanginginlife.Forquestions9-13,choosefromthelistA~Fwhateach
Youwillhearfivepeopletalkingabouttheshortcoursestheyattended.Forquestions9-13,choosefromthelistA-Fwhate
随机试题
A.扶正B.祛邪C.扶正兼祛邪D.先祛邪后扶正正虚不甚,邪势方张,正气尚能耐攻者的治疗原则是
患者,男,31岁。因外伤导致颌面部严重骨折,并出现呼吸困难。最可能引起此症状的骨折是
心脏复苏首选的药物是
关于现代工程咨询对信息基本要求的说法,错误的是()
ETF最大的特色是()。
出让国有土地使用权,以竞价方式出让的,契税的计税依据一般为竞价的成交价格,包括()。
不单独核算停工损失的企业中,停工损失直接反映在()科目中。
ABC公司是一家上市公司,该公司2015年年末资产总计为10000万元,其中负债合计为2000万元。该公司适用的所得税税率为25%。相关资料如下:资料一:预计ABC公司净利润持续增长,股利也随之相应增长。相关资料如下表所示:资料二:ABC公司认为2
党的领导、人民当家作主和依法治国三者的关系是
微型计算机键盘上的键是
最新回复
(
0
)