课件中学数学、语文、英语、物理、化学等等，很多专题摸版-courseware for secondary mathematics, language, English, physics, chemistry, etc., many thematic touch edition

能模拟物理光学实验，简单方便，不用去实验室就可以得到想要的结果！-this program simulate the physical optics experiment, simple and convenient, need not go to the lab can get the desired results!