师：上课（学生起立）班长：坐下。师：今天这节活动课是开展家庭小实验竟赛。据了解．大家为这次竞赛作了较充分的准备，希望你们能赛出成绩、赛出水平。下面有请本次活动的两位主持人上场！（鼓掌）男：各位老师，女：各位同学．合：你们好！男：首先让我们以热烈的掌声欢迎 Teacher: Class (Student Stands Up) Monitor: Sit down. Teacher: Today’s activity lesson is to carry out a family experiment competition. It is understood that. Everyone has made full preparations for the competition. I hope you can score your achievements and your level of competition. Here are the two presenters who invited this event! (Applause) Male: Dear teachers, female: Dear students. Together: How are you! M: First of all, let us welcome with warm applause