1, you can choose again. General educational administration network management system can only choose courses and by-elections. If you want to drop out of school, you should go to the academic affairs office of the college to drop out. The general withdrawal time is two weeks before the start of school. The school will inform you of the withdrawal time, and the academic affairs office will not work on Saturday and Sunday.

2, there is no way to drop out of school after the course selection time. Elective courses refer to courses arranged by students independently in the teaching plans of various disciplines and majors in colleges and universities. Not a "required course." There are restricted elective courses and unrestricted elective courses. The former refers to elective courses within the prescribed scope. For example, you must take a certain number of courses within the specified number of courses, or take a certain number of courses within the specified number of courses; The latter refers to the courses that students can choose freely without restriction.