GWD-1-Q40老看到的一道题~怎么就没整明白。。大家帮我看看哇

efay

GWD-1-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 jnjectable 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 mot effective when administered to adults.[D]

我怎么没明白这跟大人是不是从孩子那儿传染上的流感有啥关系啊~~

谢谢好人啦~^_^

特仑苏爸爸

1年以后我也碰上这道题，也没搞懂，那位大牛能不吝赐教，感激不尽。

特仑苏爸爸

已经搜到答案谢谢