/ http://www.slideshare.net/images/logo.gif / ºÝºÝߣShare feed for ºÝºÝߣshows by User: ssuser146ace https://cdn.slidesharecdn.com/profile-photo-ssuser146ace-48x48.jpg?cb=1523099858 ½ú×ÚÍÅ¶Ó www.youtube.com/user/jason521021