根据实验目的判断下列实验操作或装置正确的是( ) A. 实验室制O2 B. 发布时间:2017-05-16 12:49 │ 来源:www.tikuol.com 题型:选择题 问题: 根据实验目的判断下列实验操作或装置正确的是( )A.实验室制O2B.配制稀硫酸溶液C.在铁制品上镀铜D.净化、精制淀粉胶体
题型:选择题 Eliza remembers everything exactly as if it ______ yesterday. [ ]A. was happening B. happens C. has happened D. happened 查看答案