Ãâó : http://account.gnu.ac.kr/filedownload.do?filePath=/account/bbs/1278/20151015/&fileName=%EC%A0%9C3%EC%9E%A5%EA%B0%80%EC%B9%98%ED%8F%89%EA%B0%80%EC%97%90%20%EA%B8%B0%EB%B0%98%ED%95%9C%20%EC%86%90%EC%9D%B5%EA%B3%84%EC%82%B0%EC%84%9C%EB%B6%84%EC%84%9D.pptx