https://www.syu.ac.kr/blog/%ec%84%9c%ec%9a%b8%ec%8b%9c%eb%a6%bd%eb%8c%80%ed%95%99%ea%b5%90-2020%ed%95%99%eb%85%84%eb%8f%84-%ed%9b%84%ea%b8%b0-%ec%9d%bc%eb%b0%98%eb%8c%80%ed%95%99%ec%9b%90-%ec%8b%a0%ec%9e%85%ec%83%9d-%eb%aa%a8/2020%ed%95%99%eb%85%84%eb%8f%84-%ed%9b%84%ea%b8%b0-%ec%9d%bc%eb%b0%98%eb%8c%80%ed%95%99%ec%9b%90-%ec%8b%a0%ec%9e%85%ec%83%9d-%eb%aa%a8%ec%a7%91%ec%9a%94%ea%b0%95-pdf_page_04/