知识问答
最佳答案：Surrounding the earth is a layer of air of unknown thickness.豆豆19902009 - 助理 二级怎
最佳答案：我在做一个翻译句子 是 “工业空气污染,尤其是那些发展中国家的工业空气污染.”我写的是Industry air contamination, especiall
最佳答案：Although there is a small place,but the air is clear and the‘environment is beau
最佳答案：All the time humans can not do without air, no air no life, there is no dynamic
最佳答案：The environmnet of Beijing has been greatly improved,with the freshing air and b
最佳答案：Today we have excellent air quality.As you can see,the weather outside the windo
最佳答案：法语,哈哈,有点不好意思,我当初学的时候只是为了考试,现在早还给了老师了.There are two reasons.The first one is that
最佳答案：(3) Select the protective equipment:Protective equipment can be fuse, air switch
最佳答案：This product from flowers,fragrant smell of fruit vegetable oil extraction,gives
最佳答案：Nevertheless,the source of the air pollutants that lead to haze is still a fan,（
最佳答案：The function of condenser is to diminish the moisture in the drying room so that
最佳答案：Air quality in Beijing is bad 4 days out of 5.80% of the time,Beijing's air qual
最佳答案：City of the living environment more and more bad, poor air quality, everywhere i
最佳答案：now the earth faces a unparalleled crisis. first of all, it's the pollution we d
最佳答案：The air polution is becoming more severe.I think the main reason for that is man
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