Bài 1- Tuần 1: Thế giới xung quanh chúng ta( tiết 2)

{"id":775,"type":"document","url":"https://overmeacademy.easyedu.vn/sites/default/files/easyschool/upload/2026/07/phieu_phu_huynh_-_earth_science_-_fundamentals_1_10.pdf","width":null,"height":null,"thumbnail":"https://overmeacademy.easyedu.vn/sites/all/themes/easyedu/images/pdf-large.png"}