化学在保证人类的生存并不断提高人类的生活质量方面起着重要的作用.例如�利用化学生产化肥可增加粮食产量从而解决人们的温饱问题�利用化学研制 Template




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tomski化学在保证人类的生存并不断提高人类的生活质量方面起着重要的作用.例如�利用化学生产化肥可增加粮食产量从而解决人们的温饱问题�利用化学研制 coloring