贵刊2005年第十三期(初中生·非课改实验区6)发表了大理市下关一中段贶诚老师的文章——《证明鸡蛋壳主要成分的实验》(下简称“段文”),具体介绍了如何证明鸡蛋壳主要成分的实验操作过程及相关结论,现对本文谈谈自己的两点看法,供广大师生参考。一、段文尚未真正突出“主要” In your 2005 issue of the 13th (Junior, non-curriculum experimental zone 6), you published an article by Du Chengcheng, a middle section of Shimonoseki, Dali City, “Experiment to prove the main components of the eggshell” (hereinafter referred to as “paragraph”). ) Specifically introduced how to prove the experimental process and related conclusions of the main components of the eggshell. Now I talk about my own two points of view for the teachers and students. First, Duan Wen did not really highlight the “main”