/ http://www.slideshare.net/images/logo.gif / ºÝºÝߣShare feed for ºÝºÝߣshows by User: isaackwok5 https://cdn.slidesharecdn.com/profile-photo-isaackwok5-48x48.jpg?cb=1523394947 You only live once! Pencil do the thinking!!! ×Ó·Çô~£¬ÑÉÖªô~Öª˜·?