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Many people suffer an allergic reaction to certain sulfites, including those that are commonly added to wine as preservatives. However, since there are several wine makers who add sulfites to none of the wines they produce, people who would like to drink wine but are allergic to sulfites can drink wines produced by these wine makers without risking an allergic reaction to sulfites.

Which of the following is an assumption on which the argument depends?

AThese winemakers have been able to duplicate the preservative effect produced by adding sulfites by means that do not involve adding any potentially allergenic substances to their wine.
BNot all forms of sulfite are equally likely to produce the allergic reactions.
CWine is the only beverage to which sulfites are commonly added.
DApart from sulfites, there are no substances commonly present in wine that give rise to an allergic reaction.
ESulfites are not naturally present in the wines produced by these wine makers in amounts large enough to produce an allergic reaction in someone who drinks these wines.

正确答案: E

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楼主

发表于 2010-6-24 16:16:47 | 显示全部楼层

原文：people reaction to sulfites in wine, 但是现在有些 wine的生产商不在添加sulfites进去，结论：所以上述people可以放心的去饮用他们生产的wine了，且不用担心出现reaction to sulfites。
寻找假设：结论如果成立，必须排除wine里确实没有sulfites存在。试想如果生产商不添加并不意味着wine里绝对不可能还含有sulfites，正如答案e所说，如果wine里自然含有，则people还是有可能出现reaction的，所以需要排除这种情形存在。