The genuine online courses for postgraduate entrance examination are generally equipped with one-on-one answering, correcting mistakes, planning and other services.
Every subject in the public course of postgraduate entrance examination is a body of knowledge, including vocabulary, grammar, long and difficult sentences, reading, composition, translation, new questions and cloze. So we can see that many teachers are working hard for their knowledge, and they are more professional because they are more focused. Our study is the same. We should acquire knowledge first, and then learn the whole. Of course, everyone should learn from the best teachers, with strong pertinence, fast promotion and high learning efficiency.
Copying and reselling courses is indeed immoral, in a sense, it is an infringement (especially copying courses), which is not conducive to the improvement of people's awareness of intellectual property protection and the progress of social civilization. In principle, I don't approve of these black deals. However, unfair education and unbalanced income still exist. Sometimes, the price of postgraduate courses is outrageous, and many candidates don't have the financial strength to buy these courses, or don't have the courage to spend so much money to buy them. Therefore, from the perspective of helping candidates review, it is conducive to the spread of knowledge, has a very strong positive externality, and indirectly promotes the development of education. Users can only be admitted to graduate school if they learn well, and only when they learn can they better stimulate the vitality of social innovation.