鼠疫的主要传染源为 ( )A.老鼠B.患者C.病原携带者D.猫E.狐狸

作者: rantiku 人气: - 评论: 0
问题 鼠疫的主要传染源为 ( )
选项 A.老鼠 B.患者 C.病原携带者 D.猫 E.狐狸
答案 A
解析

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