2. 外语
  3. Ancient sailors and farmers did not have satellites and computers to help them forecast the weather. They observe the sky, winds

Ancient sailors and farmers did not have satellites and computers to help them forecast the weather. They observe the sky, winds

admin2009-04-23  44
问题     Ancient sailors and farmers did not have satellites and computers to help them forecast the weather. They observe the sky, winds and clouds. Eventually, patterns emerged and people made up sayings to remember them.
    We now realize that behind the sayings often lies real science. Here are two time-tested sayings, and the climate reasoning backing them up:
    "When the dew(露水) is on the grass, rain will never come to pass." Clear skies at night lower temperatures enough for humidity(湿度) to condense as dew. So a heavy dew forms on a summer night, except a fair day. But "when grass is dry before the morning light, look for rain before night." This is especially true if temperatures rise during the night as a result of increasing cloud cover. "If night has a fever, it cries in the morning."
    If with your nose you smell the day, some weather is on the way. Plants release oil into the atmosphere, and research indicates that the higher the humidity is, the more oils the plants gives off. This produces the distinctive smell many of us recognize when we say: "Smells like rain today."
选项
答案satellites and computers
解析 由第一段第一句可以得到答案。
转载请注明原文地址:https://kaotiyun.com/show/bvSK777K
本试题收录于： 大学英语三级A级题库大学英语三级分类
0

大学英语三级A级

大学英语三级

相关试题推荐
随机试题
最新回复(0)