小题1:D小题2:B小题3:D小题4:A 小题1:提示:第一段告诉了读者本文的中心思想。答案:D小题2:提示:从文章第二、三段可知。答案:B小题3:提示:实际所使用的垃圾处理方法是烧、埋、倾倒进河里。第四段论述了...
Disposing(处理)of waste has been a problem since humans starte
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