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尽管提供不断增加的水供给需要的计划表明,越来越多的国家认识到了目前和将来的问题。但这些计划却往往不是代价高昂,就是不切实......

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Directions: You are allowed thirty minutes to write a composition on the topic: Tuition system. You should base your composition on the following outline, and write coherently and neatly, in no less than 120 words.Outline:1.自从学费制度实施以来,它已成为中国的热门话题。人们对此问题的看法各不同。2.有人认为,世界上没有一所大学不向学生收费。3.然而,另一些人则反对学费制度。
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所以,不管是工业废物污染、生活废物污染或是其他污染,只要水源保护和净化措施不够,适宜与水有关的致命的疾病滋生的温床就会因为不可靠的水供给而不断产生。
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