◆ 内容分析
本板块利用多模态语篇—视频，呈现了三种较为常见的自然灾害：地震、
火山爆发和滑坡。学生通过观看视频、填写关键词，了解三种自然灾害的基本信
息，为进一步学习本单元话题做好准备。
◆ 教学目标
By the end of this section, students will be able to:
1. watch the video and get the basic knowledge of three types of natural disasters;
2. talk about other different types of natural disasters;
3. share with peers the information of the natural disasters in history.
