请教新东方逻辑补充上Section15-6th

viviansecret

Section 15-6. Advertisement:

  For sinus pain, three out of four hospitals give their

  patients Novex. So when you want the most effective

  painkiller for sinus pain, Novex is the one to choose.

 

  Which of the following, if true, most seriously

  undermines the advertisement’s argument?

  (A) Some competing brands of painkillers are

      intended to reduce other kinds of pain in

      addition to sinus pain.

  (B) Many hospitals that do not usually use Novex

      will do so for those patients who cannot

      tolerate the drug the hospitals usually use.

  (C) Many drug manufacturers increase sales of their

      products to hospitals by selling these products

      to the hospitals at the lowest price the manu-

      facturers can afford.

  (D) Unlike some competing brands of painkillers,

      Novex is available from pharmacies without a

      doctor’s prescription.

  (E) In clinical trials Novex has been found more

      effective than competing brands of painkillers

      that have been on the market longer than

      Novex.

答案：D。我明白D是对的，但是不明白为什么C不对。C和D看上去都像是他因法削弱，D的他因是Noves作为非处方药更容易得到，C的他因是对医院来说Noves的成本更低。是不是之所以不选C是因为C中说Many drug manufacturers increase sales of their products...没有具体说出Noves的名字所以不对呢？

请指教哦～

xfi883

你的解释思路稍有偏差。提些意见哈。。。

本题大意：

 因为——多数医院推荐N

 所以——N最有效

要削弱“因为”，就要说明，“医院的推荐,不是N是否有效的标准”

D选项说，“N是一种非处方药”，也就是说，跟医院的推荐没关系，直接否定了前提，证明了无法得出相应的结论。跟“更容易得到”没关系。

C选项说，“医药成本低”，成本低不能否定存在“物美价廉”的可能性。

viviansecret

谢谢指教：）

davidcymac88

这题是OG的10，OG的答案是C