According to the author,what may be the possible carriers of bird flu? [br] On w

游客2024-06-13 14

问题 According to the author,what may be the possible carriers of bird flu? [br] 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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According to the author,what may be the possible carriers of bird flu? [br] On w

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