[考试内容和考试要求]1.排列、组合、二项式定理考试内容:分类计数原理与分步计数原理,排列,排列数公式,组合,组合数公式,组合数的两个性质,二项式定理,二项展开式的性质.考试要求:1)掌握分类计数原理与分步计数原理,并能用它们分析和解决一些简单的应用问题.2)理解排列的意义, [Examinations and Exam Requirements] 1. Arrangement, Combination and Binomial Theorem Exams: Classification and Counting Principles and Principle of Step-counting, Arrangement, Arranging Number of Formulas, Combination, Number of Combination Formulas, Two Properties of Combination Number, Binomial Type theorem, the nature of the binomial expansion.Examination requirements: 1) master the principle of classification and counting and the principle of fractional counting, and can use them to analyze and solve some simple application problems.2) to understand the meaning of arrangement,