视频地址：https://video.cache.bdschool.cn/vd/8a7cc256f4e670ca8a508547800b082c.mp4
附件：0422初一英语(师大版)-Unit 1 Lesson 3 Safety First 1-1教案.docx
附件：0422初一英语(师大版)-Unit 1 Lesson 3 Safety First 1-2PPT课件.pptx
附件：0422初一英语(师大版)-Unit 1 Lesson 3 Safety First 1-3学习任务单.docx