白喉的传播途径有() A.以飞沫传播为主 B.亦可经玩具、衣物间接传播 C.可通过污 发布时间:2017-09-06 21:06 │ 来源:www.tikuol.com 题型:多项选择题 问题: 白喉的传播途径有()A.以飞沫传播为主B.亦可经玩具、衣物间接传播C.可通过污染的牛奶和食物引起暴发流行D.偶可经破损皮肤、黏膜而感染E.也可通过输血传染
题型:多项选择题 —Your classroom is really bright and clean. —It _____ after school every day. [ ]A. is cleaned B. cleaned C. was cleaned 查看答案