This level is not bad. If you don't have a clear idea when you look at a question for two or three minutes, skip it ~ finish the rest and look back, and try to get all the points you deserve. If you can't work it out in the end, write down all the results or formulas you can deduce, and there will always be some points ~ In addition, it is suggested to solve many problems, which can help you find your feelings, and there are many ways to solve them, which can also improve the speed and reduce low-level mistakes ~ Come on, get through it!