根据三个环节两个因素的学说,构成传染病流行的三个环节是()A.传染源、传播途径、易感者B.传染源、传染途径、易感者C.传染源、传播途径、易感人群 ...

作者: rantiku 人气: - 评论: 0
问题 根据三个环节两个因素的学说,构成传染病流行的三个环节是()
选项 A.传染源、传播途径、易感者 B.传染源、传染途径、易感者 C.传染源、传播途径、易感人群 D.传染源、传染途径、易感人群 E.传染源、传播途径、易感人群
答案 E
解析

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