流行性斑疹伤寒的传播媒介是() A.人虱 B.鼠蚤 C.恙螨 D.蜱 E.蚊 发布时间:2017-08-30 06:30 │ 来源:www.tikuol.com 题型:单项选择题 B1型题 问题: 流行性斑疹伤寒的传播媒介是()A.人虱B.鼠蚤C.恙螨D.蜱E.蚊
题型:单项选择题 B1型题 You don't have to finish the work today. You can finish it next week. A. mustn't B. can't C. needn't 查看答案