摘要: We can t live without water, but now many rivers are polluted. Hundreds of dead fish can be found on the surface of Haihe because of serious pollution. It is dangerous to drink such water.Besides Hai
(来源:文章屋网 www.wzu.com)
摘要: We can t live without water, but now many rivers are polluted. Hundreds of dead fish can be found on the surface of Haihe because of serious pollution. It is dangerous to drink such water.Besides Hai
(来源:文章屋网 www.wzu.com)