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| 同步阅读(Unit9)(英文) | |
| 作者姓名： | 姜红伟 |
| 摘 要： | 你知道什么叫“温室效应”吗?它对地球又有什么样的影响呢?A greenhouse is a building m ade of glass which is used for keepingoolplants warm when the outside tem perature is low.In a sim ilar w ay thereare several gases in the atm osphere w hich trap the heat produced by thesun and preventit from escaping.These gases are known as“greenhousegases”,and the way in w hich they trap heat in the atm osphere is called“the greenhouse effect”.This is notsim ple air pollution.M ost ofthe m aingreenhouse … |
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