PPT bai 6

{"id":3334,"type":"document","url":"https://tiengtrunghoangkim.easyedu.vn/sites/default/files/easyschool/upload/2024/11/bai_6.pptx","width":null,"height":null,"thumbnail":"https://tiengtrunghoangkim.easyedu.vn/sites/all/themes/easyedu/images/powerpoint-large.png","name":"bai_6.pptx"}