Q40:
Until mow, 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?
ans,b,mine,a
气雾剂和注射对小孩没有什么区别--->气雾剂的使用不会带来什么好处。
假设:B :气雾剂和注射原理也一样。(取非:原理不一样——>气雾剂会带来好处,削弱结论)
A:能用注射法的人能安全使用气雾剂。无关
http://forum.chasedream.com/dispbbs.asp?boardID=24&ID=74827&page=1
发贴标题请楼主参考这个链接。感谢。
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