题目

听下面一段较长对话，回答以下小题。【1】What does the man want to do at the beginning?A.To know the class schedule.B.To have a registration form.C.To get a student discount.【2】What worries the man about the classes?A.The expensive cost. B.The inconvenient time. C.The crowded classroom.【3】What will the woman talk about next?A.The coaches. B.The location. C.The exercise equipment.用实验验证Zn、Cu、Ag三种金属的活动性顺序，请写出两种可行方案所需的物质．