/ http://www.slideshare.net/images/logo.gif / ºÝºÝߣShare feed for ºÝºÝߣshows by User: ChoiSiwon4 https://cdn.slidesharecdn.com/profile-photo-ChoiSiwon4-48x48.jpg?cb=1523521155 annyeong haseyo...안녕하세요...