钩端螺旋体病的主要传染源是() A.猪 B.老鼠 C.患者 D.兔子 发布时间:2019-03-20 02:03 │ 来源:www.tikuol.com 题型:多项选择题 问题: 钩端螺旋体病的主要传染源是()A.猪 B.老鼠 C.患者 D.兔子 E.犬
题型:多项选择题 —Look! The man at the gate _______ be our headmaster. He is always standing there every morning. —No, it _______ be him. He is holding a meeting in the office now. [ ]A. must, can't B. must, mustn't C. can't, can't D. can't, mustn't 查看答案