请教一道31套的逻辑题

irislong

Q40:

Until now, only injectable vaccines against influenza have been available.  Parents are reluctant to subject children to the pain of injections, but adults, who are at risk of serious complications from influenza, are commonly vaccinated.  A new influenza vaccine, administered painlessly in a nasal spray, is effective for children.  However, since children seldom develop serious complications from influenza, no significant public health benefit would result from widespread vaccination of children using the nasal spray.

 

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

 

1. Any person who has received the injectable vaccine can safely receive the nasal-spray vaccine as well.
2. The new vaccine uses the same mechanism to ward off influenza as injectable vaccines do.
3. The injectable vaccine is affordable for all adults.
4. Adults do not contract influenza primarily from children who have influenza.
5. The nasal spray vaccine is not effective when administered to adults.

答案是D，我为什么觉得是E呢，请牛牛们解释一下好吗，谢谢！

quietliu

就是D， E与孩子没有关系，所以不是答案。我不是NN。 但是我是这么想的。你就看最后一句话，就是问题，别的都不重要，他说这个没有，是为什么说没有用呢？是说小孩子用不用没有区别，那么用不用没有区别的基础是什么呢？就是没有影响。但是D答案是有影响的。用新东方的NOT+WEAKEN的方法一试就是D。

irislong

谢谢！可我还是理解不了这题，难道我钻牛角尖了。非常感谢你的解答，我在想想