If I fail this course, how can I plead with the teacher?

The final exam of South China University of Technology is very strict, but as long as you get 45 points and do your homework at ordinary times, you can ask the teacher to reach 95 points or above in his usual grades (before the teacher scores). But in physics, if the volume is less than 45 points, it is really a fairy and can't save you. Not C.