2. 外语
  3. When sunlight enters a dark room through the blinds ______. Diffusion of light in the sky occurs owing to ______.

When sunlight enters a dark room through the blinds ______. Diffusion of light in the sky occurs owing to ______.

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问题 When sunlight enters a dark room through the blinds ______.
Diffusion of light in the sky occurs owing to ______.
选项 A、atmospheric impurities
B、molecules of gas
C、varied shades of colour
D、different times of the day
答案A
解析 推导题。文章第二自然段倒数第二句话：Thus we can see that diffusion occurs owing to all sorts of impurities in the atmosphere。即因此我们就明白了光的扩散是因为大气中存在很多各种各样的不纯物质。根据此句话，即能推出此题的正确答案应为A。
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大学英语四级

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