You can use higher education textbooks. Obviously, there is a big difference between number one and number three. Take the high number as an example. The number one is curve integral and surface integral, and the number three is not! Generally speaking, the review difficulty of Math III is much smaller than that of Math I! For the difference in specific content, you can look at the specific requirements of the 20 12 Postgraduate Entrance Examination Mathematics Outline for Mathematics I and Mathematics III!