No.1 is mainly for undergraduate majors in science and engineering, and No.2 is mainly for undergraduate majors in economics, management, medicine and agriculture. The remaining disciplines such as law, education, history, art and literature need to take three exams, and the contents are not the same.
The number three mainly examines three parts: function limit continuity, differential calculus of unary function and integral calculus of unary function. The number two adds multivariate function differential calculus, double integral and differential equation, and the number one adds vector algebra, spatial analytic geometry and infinite series, but the same content may be more than the number two.