根据几年来的教学实践,笔者认为浙教版初中科学教材中有些实验需要改进。有的实验改进后更为科学合理,有的实验改进后可节省时间、提高可见度,从而达到现象明显、效果良好的目的。一、对物体做功内能增加实验的改进原实验是用一根绳子在管外迅速来回拉动,使乙醚沸腾,从而将橡皮塞向外推出,对它做了功。笔者认为,该实验存在很大的缺陷:实验中最引人注目 According to several years of teaching practice, I believe that some of the experiments in the textbooks of the Junior High School of Zhejiang Province need to be improved. Some experimental improvements more scientific and rational, and some experimental improvements can save time and improve visibility, so as to achieve the phenomenon of obvious, good effect. First, the work of the body to do things to increase the improvement of the experiment The original experiment is to use a rope quickly pull back and forth outside the tube, so that the ether boiling, which will rubber plug out to do it. The author believes that there is a big flaw in the experiment: the most striking experiment