ppt part1: /ckfinder/userfiles/files/%E8%A3%85%E9%85%8D%E5%BC%8F%E9%92%A2%E7%BB%93%E6%9E%84%E7%BB%BF%E8%89%B2%E5%BB%BA%E7%AD%91-part1.pptx

ppt part2: /ckfinder/userfiles/files/%E8%A3%85%E9%85%8D%E5%BC%8F%E9%92%A2%E7%BB%93%E6%9E%84%E7%BB%BF%E8%89%B2%E5%BB%BA%E7%AD%91-part2.pptx