Set, simple logic, function, sequence, trigonometric function, plane vector, inequality, equation of straight line and circle, conic curve, straight line, plane, simple object, permutation, combination, binomial theorem, probability, probability statistics, limit, derivative, complex number. According to the survey of 5 1.com, it is more difficult to learn mathematics in grade two than in grade one, which is also a watershed. The three major problems in the college entrance examination are all from the second year of high school. Senior two should not only be familiar with what senior one has said, but also learn new knowledge.