Longmen is so difficult. I am a junior. I still remember using the Longmen at that time. This is a good book. As long as the above questions are carefully done and understood, the auxiliary materials are still reliable. Examination papers should be appropriately increased or decreased on the basis of difficulty analysis in previous years. It is best to think while doing the problem. What is the difference between asking a question in another way and deleting the result or answer of a given condition? Think more, don't die. Not incompetent. It is because of the limitations of thinking. Anyway, if you get a perfect score of 150, there is no problem. There seems to be a stack of papers at the end (the questioner is a pervert). Today, I am free. Read the post. I haven't been on Baidu for a long time, and I don't even know Baidu.