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gre改革后新版gre写作新题库里的作文方面的一个重要变化是有了指导语。而指导语的作用是有助于我们的逻辑性写作，以下是新版gre写作新题库内有关argument121的写作部分： 题目： The following appeared in a memo from the director of a large group of hospitals. In a controlled laboratory study of liquid hand soaps, a concentrated solution of extra strength UltraClean hand soap produced a 40 percent greater reduction in harmful bacteria than did the liquid hand soaps currently used in our hospitals. During our recent test of regular-strength UltraClean with doctors, nurses, and visitors at our hospital in Worktown, the hospital reported significantly fewer cases of patient infection than did any of the other hospitals in our group. Therefore, to prevent serious patient infections, we should supply UltraClean at all hand-washing stations, including those used by visitors, throughout our hospital system. Write a response in which you examine the stated and/or unstated assumptions of the argument. Be sure to explain how the argument depends on these assumptions and what the implications are for the argument if the assumptions prove unwarranted. 中文翻译： 再一次对于抗菌洗手液的实验研究中，超强UC浓缩液比我们医院目前使用的洗手液多杀40%的有害细菌。我们对在W的医院的使用常规UC洗手液的医生，护士以及访客做的随后测试中发现，该医院上报的患者感染数量明显少于我们集团的其他医院。因此，为防止严重的患者感染，我们应该在我们的医院系统内的所有洗手站提供UC洗手液。 | 
