According to the standard of postgraduate entrance examination, science and engineering students take the first and second grades. Students majoring in economic management, senior three or four.
Specifically, the first (second) of high numbers includes: one-dimensional and multivariate calculus, one-dimensional ordinary differential equations, probability theory, preliminary statistics, linear algebra, and some schools also require some contents of numerical analysis.
High number three (four) includes one-dimensional and multivariate calculus foundation (without curve and surface integral and triple and above integral), linear algebra (without Jordan standard, invariant space and abstract algebra), simple ordinary differential equation (simply referring to breeze equation type summarized in general high number books) and probability theory (without statistics).
Shu Gao of Tongji Edition is a good reference book, and Shu Gao of Peking University Press (up and down) is also a good textbook, with a large number of exercises and examples. Qiu's Concise Linear Algebra is also a good textbook.