下列实验操作正确的是( ) A. 读出液体的体积 B. 过滤 C. 熄灭酒 发布时间:2017-05-16 10:55 │ 来源:www.tikuol.com 题型:选择题 问题: 下列实验操作正确的是( )A.读出液体的体积B.过滤C.熄灭酒精灯D.稀释浓硫酸
题型: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