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  3. Advertisement: Of the many over-the-counter medications marketed for the relief of sinus headache, SineEase costs the least per

Advertisement: Of the many over-the-counter medications marketed for the relief of sinus headache, SineEase costs the least per

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问题 Advertisement: Of the many over-the-counter medications marketed for the relief of sinus headache, SineEase costs the least per dose. And SineEase is as effective per dose as the most effective of those other medications. So for relief from sinus headaches, SineEase is the best buy. Which of the following, if true, most seriously weakens the argument above?
选项 A、Most of the over-the-counter medications marketed for the relief of sinus headache are equally effective per dose in providing such relief.
B、Many of the over-the-counter medications marketed for the relief of sinus headache contain the same active ingredient as SineEase.
C、People who suffer from frequent sinus headaches are strongly advised to consult a doctor before taking any over-the-counter medication.
D、An over-the-counter medication that is marketed for the relief of symptoms of head cold is identical in composition to SineEase but costs less per dose.
E、The per dose price for any given over-the-counter medication marketed for the relief of sinus headache is higher for smaller packages than it is for larger packages.
答案D
解析 本题难度较大。其逻辑推理为：缓解窦头痛的非处方药中，SineEase成本低，所以缓解窦头痛最好用SineEase。简化推理就变为“因为SineEase成本低，所以购买SineEase”，(A)中的“equally”与(B)中的“the same…as”揭示的是相同点，不可能Weaken上面推断；(C)中any绝对化语言必然不对；(E)为无关比较；而(D)说明某药组成与SineEase一样，但每剂成本更低，起到了反对作用。很多同学之所以不理解(D)为什么正确，主要是忽略了(D)中的“identical in composition”。试想若某药与SineEase组成完全一样，那么它必可被用来缓解窦头痛且达到同样的效果，但它成本更低，因此更好地选择应为这种药，值得注意的是(D)并未反对事实，段落中的事实是SineEase是缓解窦头痛的非处方药中最便宜的，而(D)中的某种药是缓解感冒症状的非处方药中最便宜的。
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