[求助]两道补充材料的逻辑，完全不明白：（

rice3434

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.
答案是d，凭感觉选的。可是不知道为什么到底是怎么削弱的。

---------------------------------

Despite the approach of winter, oil prices to indus-
trial customers are exceptionally low this year and
likely to remain so. Therefore, unless the winter is
especially severe, the price of natural gas to indus-
trial customers is also likely to remain low.

Which of the following, if true, provides the most
support for the conclusion above?
(A) Long-term weather forecasts predict a mild winter.
(B) The industrial users who consume most natural
gas can quickly and cheaply switch to using
oil instead.
(C) The largest sources of supply for both oil and
natural gas are in subtropical regions unlikely
to be affected by winter weather.
(D) The fuel requirements of industrial users of nat-
ural gas are not seriously affected by the
weather.
(E) Oil distribution is more likely to be affected by
severe winter weather than is the distribution
of natural gas.

答案是b。完全不明白阿……

谢谢大家了：）

cranberry

1，文章的逻辑是，此药开地多是因为有效，消弱的选项说，是因为容易买到。他因消弱。

2，文章说汽油的价格低且会持续一段时间，结论是天然气的价格也不会涨。那么支持的结论应该在石油和天然气这两种消费之间建立某种联系。只有B建立了这种联系。

rice3434

谢谢cranberry。第二题能在解释一下么？是因为能在两种之间随便换来换去么？

creditadvice

我也有和RICE3434类似的疑问。

凭感觉，我选了B，因为隐约感觉到B建立了某种石油与天然气的联系，但这种联系到底是什么呢？怎么就能说是能互相切换来用的呢？

dashasha

creditadvice mm，你想啊。有B存在，那么如果NATURAL GAS变贵的话，用户可以马上转去用OIL，所以NATURAL GAS价格也一定低。

QQSS

完全替代消费品的价格具有连动粘性！

只需建立完全替代关系就行了！

GreenHorse

第一题不明白。为什么不是B呢？

论点是因为医院用NOVEX多， 所以你应该选用。并不是讲市场消耗量啊。

而医院是有prescription的。自己可以去pharmacy买药跟这有关系吗？指点！

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?

  (B) Many hospitals that do not usually use Novex
      will do so for those patients who cannot
      tolerate the drug the hospitals usually use.

  (D) Unlike some competing brands of painkillers,
      Novex is available from pharmacies without a
      doctor’s prescription.