2. Organic Chemistry C means that your major has little to do with this course. In all your subjects, it is not so important and simple, but you must study it.
3. College Physics A means that the main course of your major is college physics, which is specially set up for physics majors.
4. Physical Chemistry D is a course with the least contact with your major, but it is also a compulsory course.
5. For example, which majors are Math 1, 2, 3, Math 1, Math 2 is engineering, Math 3 is finance and management, and the difficulty is linked.
Extended data:
University courses are generally divided into compulsory courses and elective courses according to professional categories. Compulsory generally refers to the requirement that students must take a certain course in a school or department, and the school generally has unified requirements and arrangements for compulsory courses.
According to 1997, the catalogue of disciplines and specialties for awarding doctoral and master's degrees and training graduate students is divided into philosophy, economics, law, education, literature, history, science, engineering, agriculture, medicine, military science, management, art 13, and there are several first-class disciplines under each category, such as mathematics under science.
Compulsory courses in universities, such as mathematics and philosophy, and elective courses, such as moral education and Mao Zedong Thought (Jiangsu), are all relative to "elective courses". From the original meaning, it is very important to explain the courses that must be studied and mastered in learning.
Although there are compulsory courses and elective courses, university lecturers will still finish reading them, and students need to get a certain score to pass, so they must master them.
Baidu Encyclopedia-Compulsory Course