传染病流行的基本条件:A.病原体、人体和它们所处的环境B.病原体、易感人群、感染动物C.传染源、易感人群、传播途径D.传染源、传播途径E....

作者: rantiku 人气: - 评论: 0
问题 传染病流行的基本条件:
选项 A.病原体、人体和它们所处的环境 B.病原体、易感人群、感染动物 C.传染源、易感人群、传播途径 D.传染源、传播途径 E.社会因素、自然因素
答案 C
解析

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