For an experienced graduate student, it is not necessary to take public courses, but it is recommended to take professional courses. Of course, it's a bit wasteful to enroll in a professional course of this major in our school, but if it's a cross-major postgraduate entrance examination or the foundation is not good, I suggest you enroll in a professional course remedial class, because after cross-major, you don't know much about the specific content of another major, and even if you read it, you may not be able to grasp the key points. Enrolling in the class will help you grasp the key points and choose the key points for review. At that time, I taught myself the public course, and the professional course was reported to the professional course of Heaven Postgraduate Entrance Examination. After ...