Hellow guys, Welcome to my website, and you are watching (2020 온라인 수업 사전 교육자료) 디지털 시민교육 영상. and this vIdeo is uploaded by 서울시교육청TV at 2020-04-07T18:01:01-07:00. We are pramote this video only for entertainment and educational perpose only. So, I hop you like our website.