SUN, Haiyan. RESEARCH ON THE IMPROVEMENT OF CORE QUALITY OF "DOUBLE-QUALIFIED" TEACHERS IN VOCATIONAL COLLEGES UNDER THE BACKGROUND OF NEW ERA . Journal of E-Learning and Educational Technologies (JEET), [S. l.], v. 9, n. 3, p. 1–8, 2023. Disponível em: https://zapjournals.com/Journals/index.php/jeet/article/view/1511. Acesso em: 29 apr. 2025.