构成传染的最基本因素是A.机体免疫状态B.传染途径C.季节变化D.病原体E.年龄 发布时间:2017-12-17 14:08 │ 来源:www.tikuol.com 题型:单项选择题 问题: 构成传染的最基本因素是A.机体免疫状态B.传染途径C.季节变化D.病原体E.年龄
题型:单项选择题 A child, if brought up in ______ large family, is more likely to develop______ ability to share with ________others.A./; an; theB.a; the; /C.the; an; theD.a; the; the 查看答案