传染病的流行过程必须具备哪三个基本环节A.病原体、环境、易感人群 B.传染源、传播途 发布时间:2018-07-06 15:36 │ 来源:www.tikuol.com 题型:单项选择题 问题: 传染病的流行过程必须具备哪三个基本环节A.病原体、环境、易感人群B.传染源、传播途径、易感人群C.传染源、传播途径、环境D.病原体、环境、传染源E.病原体、传播途径、易感人群
题型:单项选择题 -- I hear Andy and Lily are going to have a party to celebrate their ten years of ____ . --- Really? They have ____ for ten years?A.marrying, marriedB.marriage, marriedC.marrying, got marriedD.marriage, been married 查看答案