三则实验小改进何海明（浙江省绍兴市东湖中学，３１２０００）从科学性、简洁性来衡量部分高中物理学生实验，有改进的必要．有些实验只需作一点简单的小改进，就能获得良好的实验效果，本文就此介绍三则实验小改进．１．选择合适的间距，绘好等势线描绘电场中的等势线普... Three experimental improvements He Haiming (Donghu Middle School, Shaoxing City, Zhejiang Province, 312000). Some high school physics student experiments were measured in terms of scientificity and conciseness. There was a need for improvement. Some experiments need only a little simple improvement to get good experimental results. This article introduces three experimental improvements. 1. Select the appropriate spacing, draw equipotential lines to describe the equipotential lines in the electric field...