Lin li 880 has 880 questions. * * * is divided into three parts, one part is basic and the other part is comprehensive. The later expansion questions are more comprehensive and have a certain mathematical foundation, especially for students in World War II. Lin li 880 degrees is moderate, it is comfortable and difficult to do, but there are no strange questions, close to the real questions, and there are a few minor mistakes, which are generally good.

There is a difficulty gradient of 880, in which the basic questions should be between foundation and reinforcement, and the medium questions are suitable for reinforcement. Although the difficult part is difficult, it also varies from person to person. The whole book is of high quality.

This set of books is generally compared with 660 or used together. If you have a solid foundation, I suggest that the foundation and comprehensive articles of 880 have been done, especially the foundation is worth brushing. And 660 should set aside time to do it. In the background of optional 80, this book is almost a must-read. Because the investigation of the concept is very detailed, it conforms to the current proposition trend (more and more attention is paid to the understanding and application of the concept, and the proposition is not routine).