Do more questions, because there is nothing written in the book except concepts and inductive concepts. There should be no big problem with quadratic roots, as long as they can be simplified, calculated and rationalized. As for functions, there are quite a few books. The questions in the basic exam are all about changing the questions in the textbook, or combining the equations (groups) of senior one, seeking solutions and discussing them in categories. There is nothing to worry about. But if the ability of flexible use is not good, the function can only keep its score by doing more promotion. The latter similarity is generally not too difficult in the exam. At most, you can use the nature of proportion to deduce another proportion from one proportion. Anyway, this place is about transformation ability, and there are some things that use kangaroo knowledge flexibly. In addition, this part of similarity is easy to be combined with other knowledge (such as function, right triangle, isosceles triangle, quadrilateral ...). In this way, you can only see your mastery of other local knowledge, or you can do more questions and review the original knowledge from the questions. To solve a right triangle, we only need to remember Pythagorean theorem and acute trigonometric function. No matter how the formula changes, what I say here can be expressed by trigonometric function or sum of squares. This is very useful for solving right triangle. There is nothing to say about statistics. It's clearly written in the textbook.

The most important thing in the textbooks published by Dongxue Normal University is flexible use and careful thinking. The only way to achieve these two points is to do more questions, ask more questions and summarize more.