According to the query, the core task of China's higher education reform and development is (). A. guard the country and serve the school; B. the school is the main body of evaluation and quality assurance; C. The transition from emphasizing conclusion to emphasizing process should be treated with "normal mind and normality"; D. equal exchange and interaction between evaluation experts and schools; E. pay attention to students. The answers are A, B, C, D and E. Therefore, it is to protect the country and serve the school. The school is the main body of evaluation and quality assurance, and it has changed from focusing on conclusions to focusing on processes, treating it with "normality and normality". Evaluation experts and schools exchange and interact equally, highlighting students-oriented.