First of all, the first question about choosing the exam is the so-called plane geometry, which I don't recommend. Although the knowledge-based framework originated from junior high school, our senior high school mainly studied analytic geometry, but did not discuss plane geometry in depth. Most schools don't offer this course, so we need to have a good feeling about plane geometry, not to mention forgetting our knowledge. So don't choose, don't choose.

Regarding the second path, polar coordinates and parametric equations, I personally recommend this one. First of all, the knowledge is simple, and secondly, this book undertakes the knowledge of analytic geometry, which is compulsory in high school and optional in 2-3. Looking at the real college entrance examination questions in recent years, this question has a high score rate and generally consumes the least time to solve problems.

As for the third question, inequality, this book has a great degree of continuation and expansion on the basis of compulsory courses in high school. It is best to avoid children's boots that are not very interested in inequality and definition domain classification. Of course, if your school offers this course, you can also choose to do it.

To sum it up.

The order of selection is

4-4>4-5>4- 1