求一篇英语作文,fight against air pollution
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求一篇英语作文,fight against air pollution
答案
Air pollution has become a serious problem in recent years.There are a lot of causes.first of all,is the chemical noxious gases emission.We all know that there are a lot of of factories around the wor...
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我想写一篇关于奥巴马的演讲的文章,写哪一篇好呢?为什么好
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