1, required: study is required, especially to obtain a degree or meet graduation requirements. 2. Elective course is a term in the reform of new curriculum standard and a course type in the adjustment of curriculum structure. Contrary to the elective course, it is a compulsory course. 3. Compulsory courses in senior high school refer to learning Chinese, mathematics, English, physics, chemistry, politics, geography, history and biology in senior one. 4. High school elective refers to the liberal arts and sciences in senior two, and the liberal arts: history, geography and politics; Science: chemistry, physics, biology.

# Compulsory # Elective # Senior High School Compulsory # Senior High School Elective # New Curriculum Reform