Difficulty Analysis of Physics Test Questions in Senior High School Entrance Examination Based on Bao Jiansheng's Test Question Difficulty Quantification Tool——Take the 2016-2020 Chengdu High School Entrance Examination as an example

The difficulty of test paper is an important index of test paper quality. Most existing research methods can only determine the relative difficulty of a topic, but can not explain the factors that affect the difficulty of the test paper. Therefore, Bao Jiansheng's quantitative model of difficulty is selected as a research tool, and the physics test paper of the senior high school entrance examination in Chengdu, Sichuan Province from 2016 to 2020 is taken as  an example to analyze its difficulty.Get the characteristics of physics difficulty changes in recent five years, and on this basis, put forward corresponding suggestions on the test paper life system, in order to provide new ideas for scientific proposition, teachers and students preparing for exams.