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最佳答案：Water pollution is a serious problem threatening the survival of human beings, p
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最佳答案："Protecting the environment is everyone's duty.How should we do?I think we shoul
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最佳答案：The water here is polluted seriously,so is the air.It is just because human bein
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最佳答案：一天,我在校园走了一圈,发现校园里的垃圾还真不少,塑料袋,碎纸,雪糕纸…… 这些引起了我的反思—— 我们天天都是生活在大自然中.生活在这美好的一切当中.地球妈妈
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最佳答案：Pollution has been considered as a global problem,as it imposes extremely nagati
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最佳答案：Along with joined in WTO,we found it became more and more important of studying
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最佳答案：My name is ××.When I grow up,I want to be a biology teacher because then I could
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最佳答案：人为因素Human factors城市有毒颗粒物来源：City of toxic particulate matter sources:第一：是汽车尾气。使用柴
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最佳答案：不骗我？
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最佳答案：We can’t live without water,but now the water was polluted.It is the biggest pro