/ http://www.slideshare.net/images/logo.gif / ºÝºÝߣShare feed for ºÝºÝߣshows by User: charlottezhao9 https://cdn.slidesharecdn.com/profile-photo-charlottezhao9-48x48.jpg?cb=1523505419 Õ¬¸¯¶þ´ÎÔªÎÄÒÕѧÊõ¶¹°ê