Math suddenly dawned on me in junior high school. Some people say that there is little difference on the first day, polarization on the second day, and down-to-earth on the third day, which is really good. Really in the third grade, the top students are an echelon, and the gap between the first and second places, the second and third places will be greatly widened. As the first in the class, the gap between the second place and the second place in each exam is basically greater than the gap between the second place and the tenth place. However, all subjects are at the upstream level, which is not enough for respondents to gain an overwhelming advantage over the second place in the grade. You can't pull the second place up and down by 20 points in the grade section until you begin to understand mathematics and reach the first place in the whole school, because mathematics can pull 10 more points. That's really a feeling of taking off! Mathematics is good and self-confidence is unprecedented, so that several other subjects have also played an extraordinary role in the selection examination, and finally achieved a feat of pulling the second place up by more than 30 points.