A A haze of light is formed from artificial lights such as streetlights and building lights.
B Lights from different sources in the city stream into space and illuminate the night sky来自于不同来源的光进入太空并照亮了夜空.
C The night sky is illuminated by the lights from big glowing cities in the night夜空由晚上大城市发出的光照亮.
D Stargazing becomes difficult because there is a layer of haze in the air由于空气中有一层霾,所以观望星星变得困难.
分析:本题的关键词是light pollution,而且按照题目的题号应该在文章的前面,所以从第二段找找看:
If youve ever driven toward a big city at night and seen its glow from a great distance, youve 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 stargazingdifficult所以,D的表述同光污染没有关联。
3.Does the writer think growing cities affect astronomers work?Why does he think so?
A Yes.Because the once dark rural areas are polluted by lights因为曾经黑暗的乡村地区被光污染了.
B No.Because they Call still see stars in rural areas.
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