考试成绩对于检查学校的办学水平、评估教学质量、考核学生学习是否合格等具有重要意义，而试题的难易程度（即难度．本文所说的难度值是指得分率或通过率），对于学生的考试成绩、学习质量的影响极大．试题的难度不仅影响着试题的区分度，影响考生成绩的相对分布，还直接... Test scores are of great significance for checking the school’s educational level, assessing the quality of teaching, and assessing students’ academic qualifications. The degree of difficulty of the test questions (ie difficulty. The difficulty value in this paper refers to the score or pass rate) for students. The test scores and quality of study have a great impact. The difficulty of the test questions not only affects the discriminating degree of test questions, but also affects the relative distribution of test scores. It also directly...