For example: distance space topological space whether distance space must be topological space, how to construct an open set?

Different majors are different. First of all, we must understand the requirements of the second interview, be optimistic about the subject of the second interview, and be optimistic about the proportion of each part of the second interview. Take action when you have a review plan in mind! The second interview is different from the first one. The first test is the ability to do problems, and the second test is the ability to understand. Let the teacher feel that you know something about this subject. Problems that will be ignored in probability theory: the definition of probability space, the definition of random variables, the relationship between Poisson distribution and binomial distribution, etc. There are several points: the relationship between Riemann integral and Lebesgue integral, and the relationship between continuously differentiable differentiability. This kind will not be paid attention to in the written test. These nouns are familiar. Mathematics major is well known, but it may be confusing to ask.