Ãâó : http://cer.knue.ac.kr/nvboard/filedown.jsp?bodcode=cer_teacher_edu&filename=22-3%20%EC%9E%90%EA%B8%B0%ED%8F%89%EA%B0%80%20%ED%99%9C%EB%8F%99%EC%9D%B4%20%EC%B4%88%EB%93%B1%ED%95%99%EC%83%9D%EC%9D%98%20%EB%A7%90%ED%95%98%EA%B8%B0%20%EB%8A%A5%EB%A0%A5%EC%97%90%20%EB%AF%B8%EC%B9%98%EB%8A%94%20%EC%98%81%ED%96%A5.pdf&maskname=11382073110246