Generally, there is no, but the earliest source of information is the research and recruitment office, which is convenient for you to buy it yourself, but there is generally no standard answer; Followed by the school's copy room, which contains real questions and answers (usually made by students, the accuracy is hard to say, the best answer is discussed with the research friends themselves); Finally, this information is generally sold in the school's postgraduate forum and Taobao, which is more expensive than 1 and 2. After all, he sells according to the information (which is what seniors or school copy rooms do).