Plural numbers are not too important, but they are necessary. Generally, there is a question in the college entrance examination. The form of the question is to choose or fill in the blanks, and the score is about 5 points. Generally, the series will give a question to fill in the blanks or choose a big question, and the score is generally 15 to 20 points. Analytic geometry is more important, and there are many comprehensive problems. Many big problems can be solved by using the idea of analytic geometry. It is related to other parts of knowledge. Of course, analytic geometry is widely used and flexible. Understanding should not be limited to concepts, but should focus on understanding and application.