排列组合问题是高考必考内容,近年来高考命题已逐步趋于多样化,但在高考试卷中一般仍以选择题或填空题形式出现。它联系实际,生动有趣,但题型多样,思路灵活,不易验证。怎样指导学生复习好这部分内容呢?行之有效的方法是将题型与解法归类、识别模式、熟练运用,能起到事半功倍的 Arranging combinatorial questions is the college entrance examination must be content, college entrance examination proposition in recent years has gradually become more diverse, but in the entrance examination papers are generally still multiple choice questions or fill in the blank form. It is practical, lively and interesting, but it has many kinds of questions, flexible thinking and difficult to verify. How to guide students to review this part of it? The effective method is to assign questions and solutions, identify patterns, skilled use, can play a multiplier