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According to the author,what may be the possible carriers of bird flu? On what condition can the birds spread the influenza thr
According to the author,what may be the possible carriers of bird flu? On what condition can the birds spread the influenza thr
admin
2009-08-19
41
问题
According to the author,what may be the possible carriers of bird flu?
On what condition can the birds spread the influenza through migration?
选项
答案
The mutated virus finds its way back into wild populations.
解析
根据题干中的关键词spread和through migration定位到倒数第五段,可知在家禽体内,禽病毒可能变异为像H5N1一样毒性更强的流感病毒,如果此类变异病毒被野鸟感染,这些鸟就会通过迁徙传播流感。
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0
大学英语六级
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