题目

听下面一段较长对话，回答以下小题。【1】What is the relationship between the speakers?A.Schoolmates.B.Teacher and student.C.Father and daughter.【2】Why did the woman forget to bring her school sweater?A.She thought it was Wednesday.B.Her science teacher didn’t tell her that.C.Her mind was occupied with something else.【3】What does the man forget?A.His birthday.B.The science class.C.The day of the week.水是生命之源，下列关于水的说法不正确的是（　　） A、生活中煮沸水可以降低水的硬度B、硬水过滤后可软化为软水C、水（H2O）和过氧化氢（H2O2）都由氢元素和氧元素组成D、过量使用化肥会导致水体污染