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It is an unfortunate fact of today’s life that most people are growing up un
It is an unfortunate fact of today’s life that most people are growing up un
游客
2024-01-15
65
管理
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 rural areas. We have lost our view of the stars and【C2】______Our nighttime environment as well.
Such a loss might be acceptable if light pollution were the inevitable price of progress, 【C3】______it is not. Most sky glow is unnecessary. It comes mainly from lighting sources that do little to increase【C4】______safety, security or utility. They produce only glare, costing Over one billion dollars annually in the U.S. alone.
【C5】______science, the impact has been even more dramatic. Scientists require observations of extremely faint objects that can only be made with advanced devices at sites【C6】______of air pollution and urban sky glow. For example, some images of the objects can offer information about faraway corners of the universe, helping us understand the way in【C7】______our world was actually formed. Therefore, the light from these objects can be lost at the very end of its【C8】______in the glare of our own sky.
Reducing light pollution is not difficult. It requires that public officials and citizens be【C9】______of the problem and act to counter it. As individuals, people can help reduce sky glow just by【C10】______lighting only when necessary.
The stars above us are a priceless heritage. We must do our best to preserve it. [br] 【C7】
选项
A、that
B、what
C、when
D、which
答案
D
解析
语法判断题。题干大意:例如,某些物体的光影可提供宇宙边缘地带的信息,并帮助我们了解地球最初形成的情况。根据本句的意思及语法现象,后半句应是一个定语从句。本题测试的考点是定语从句关系代词which。
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