It is difficult to take the entrance examination for Mathematics 120. Because college entrance examination math candidates have many opportunities to practice. Postgraduate entrance examination is different. After four years in college, candidates seldom study mathematics, which is of course related to their majors. For most majors, there is little contact with mathematics. Even for those majors who are often exposed to postgraduate mathematics, the difficulty of the questions obtained by the postgraduate entrance examination room is not a level of difficulty at all. Judging from the difficulty of the exam, the mathematics for postgraduate entrance examination is more complicated and challenging than that for college entrance examination. Mathematics topics for postgraduate entrance examination are generally complicated, which requires candidates to have a solid mathematical foundation and strong thinking ability. Although the math problems in the college entrance examination are also difficult, they are relatively basic.