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It is an unfortunate fact of today’s life that most people are growing up unable to see the stars. The prime night sky exists on
It is an unfortunate fact of today’s life that most people are growing up unable to see the stars. The prime night sky exists on
admin
2017-06-27
77
问题
It is an unfortunate fact of today’s life that most people are growing up unable to see the stars. The prime night sky exists only【C1】______pictures. This is true not only in cities and suburbs, but also in【C2】______areas. We have lost our view of the stars and【C3】______our nighttime environment as well.
Such a loss【C4】______be acceptable if light pollution were the inevitable price of progress,【C5】______it is not. Most sky glow is【C6】______. It comes mainly from lighting sources that do little to increase【C7】______safety, security or utility. They produce only glare,【C8】______over one billion dollars annually in the U. S. alone.
【C9】______science, the impact has been even more dramatic. Scientists require observations of extremely faint objects that can only be【C10】______with advanced devices at sites【C11】______of air pollution and urban sky glow. For example, some images of the objects can【C12】______information about faraway corners of the universe, helping us understand the way in【C13】______our world was actually formed.【C14】______, the light from these objects can be lost at the very end of its【C15】______in the glare of our own sky.
Reducing light pollution is not difficult. It【C16】______that public officials and citizens be【C17】______of the problem and act to counter it. As【C18】______, people can help reduce sky glow just by【C19】______lighting only when necessary.
The stars above us are a【C20】______heritage. We must do our best to preserve it.
【C7】
选项
A、nighttime
B、lifetime
C、peacetime
D、longtime
答案
A
解析
本题考查名词词义辨析。由上文说人工白昼是不必要的,下文解释原因,“它们并非是用来增加夜晚安全或照明的,它们只是发出耀眼的光”。nighttime“夜晚”;lifetime“一生”;peace—time“和平时期”;longtime“长时间”。由题意可知A选项正确,故选A。
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