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填空题
About one-third of the pollutants entering the sea come from atmospheric inputs.____

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参考解析
解析:
由题干中“one-third of the pollutants”定位至B段。本句指出,进入海洋的污染物中,有33%来自大气;“三分之一”与原文中的“33 percent”所指的比率相同。故匹配段落为B段。
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