通过图像演示了惠更斯（球面）原理。

晶体结构的动画素材。

This is a new textbook on learning quantum mechanics. Lots of solved problems are included. This book is meant to be a text for a first course in quantum physics. It is assumed that the student has had courses in Modern Physics and in mathematics through differential equations. The book is otherwise self-contained and does not rely on outside resources such as the internet to supplement the material. SI units are used throughout except for those topics for which atomic units are especially convenient.

《制革工业废水处理》电子图书，高忠柏、苏超英著，共六章，化学工业出版社出版。

该电子文稿内容详尽具体，并附有大量的公式。

英语四级模拟试题（附答案）。

专题1：经济学的性质 专题2：微观经济学：市场理论 专题3：微观经济学：厂商理论 专题4：宏观经济学 专题5：国际经济

杀虫剂农药分子式参考资料，包括300多种杀虫剂农药，按照通用名、国际通用名、化学名和结构式编排。

3ds max应用制作电子教案（四），内容包括大厅效果图的制作、客厅空间的制作。

分4画面演示了光栅衍射条纹的物理现象。