Mathematics has elective courses 2- 1, 2-2, 2-3, which are required in the exam, while polar coordinates and geometry in elective courses 4- 1, 4-2 are two small questions in the last question of the fill-in-the-blank question, so you can choose one of them.

Then, as for whether the elective content changes every year, except for the addition of 4- 1 and 4-2 in the college entrance examination this year, it has not changed in recent years, and it has not changed since the new curriculum standard. However, in recent years, the area of curriculum reform has often changed little, so it may change in recent years, but it is relatively stable in recent years.

I hope it helps you.