classes:  lecturer. It is necessary to increase the number of practice sessions, 3 sessions are relatively few, not enough for lecturers to communicate all the practical content.  curriculum. It is necessary to increase the number of practice sessions, 3 sessions are relatively few, not enough for lecturers to communicate all the practical content.  facility. It is necessary to increase the number of practice sessions, 3 sessions are relatively few, not enough for lecturers to communicate all the practical content.  general. It is necessary to increase the number of practice sessions, 3 sessions are relatively few, not enough for lecturers to communicate all the practical content.