Because of its position in the college entrance examination, it is listed as three main courses. In the college entrance examination, each subject has a sub-topic of 150, which is higher than other subjects, so it is listed as the main examination of three subjects. The college entrance examination raised their scores to 150 because of their application in practice and other subjects. Chinese is a national language, so we must learn it well. Of course it's the point. Mathematics is also very useful. First, it can train people's agile thinking ability. Second, mathematics is used in all industries to some extent, and some subjects are not taught in universities. English is essential for studying abroad or reading foreign scientific research materials.