1, content: the topic society has a summary of knowledge points, examples and answer analysis; Required questions are just questions, not examples.
2. Difficulty: The difficulty of problem help is mainly aimed at beginners; The required questions are difficult, covering the difficulties and key points of high school mathematics, and there are also many real and simulated questions in the high school graduation exam.
3. Applicable object: Question help is suitable for students who need to summarize knowledge points and examples; Required questions are suitable for students who need a lot of practice.