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最佳答案:1、我们必须尽最大的努力来防止河流的污染.We must try our best(to prevent the rivers from being pollu
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最佳答案:Abstract:The loss of power plants in the soft drinks,according to the losses is
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最佳答案:At the birthday party,half of the guests drink soda,1/4 of the guests drink lemo