Friends above can't say that. The key is to see if you are good at that course. Still have to measure it yourself. You have more confidence in that course. People often say that it is good to know, but I think the physics competition is more difficult. What is the reason? Is it because this course is definitely not an ordinary topic if it is a competition? There are many factors to analyze in physics, and there are also many unexpected factors. If you can't think of that, it's hard to learn.