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  3. According to the author,what may be the possible carriers of bird flu? By saying "bird flu viruses appear to exist in ducks in

According to the author,what may be the possible carriers of bird flu? By saying "bird flu viruses appear to exist in ducks in

admin2009-08-19  33
问题 According to the author,what may be the possible carriers of bird flu?
By saying "bird flu viruses appear to exist in ducks in a low-pathogenic form" (Para.6), the author suggests that infection
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答案doesn’t usually lead to severe illness and death
解析 定位到第六段可知，作者提到bird flu viruses appear to exist in ducks in a tow-pathogenic form是想表明，传染通常不会导致严重的疾病和死亡。
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