新东方老师王强录音，俞敏洪主编的美文，是学习英语的好材料。mp3格式，共30个文件。

芳烃： 1、芳香族化合物的来源，芳烃的分类，命名 2、苯的结构特征（the Feature of Benzene Structure） 3、芳烃的主要反应（Main Reactions of Benzene ） 4、苯环上取代基的定位规则（the Orientation of Substituted Groups） 5、介绍几种重要的单环芳烃（Some Important Single-ring Aromatic Compounds ）

201 Killer Cover Letters is for any job seeker who finds it difficult to write the per- fect cover letter—and that’s almost all of us! This book tells you how to write every type of job search letter you’ll ever need and puts at your fingertips a library of letters that will get noticed and get results.

Diffusion of oxygen to the binuclear center studied by molecular dynamics simulations,此素材为mov格式，须QuickTime播放器播放。

《投资概念学》（the concept of investing）课程ppt，英文版。共六部分。

方差分析即analysis of variance，简称ANOVA。功能：分析实验数据中不同来源的变异对总变异的贡献大小，确定实验中的自变量是否对因变量有重要影响。

美国净水厂实验室手册（pdf）：Manual for the Certification of Laboratories Analyzing Drinking Water，内容完整。

《色谱柱和色谱系统的故障检修》，讲解HPLC Components HPLC的组成、Categories of Column Problems色谱柱问题的类型、Determining the Cause and Correcting High Back Pressure查出原因，纠正压力等。

This is a plain CPK model, but with a world map texture-mapped onto the surface.It was riginally a demo for one of my commercial clients. They decided they wanted something a little different, so I put it up here

Steered molecular dynamics, performed by applying a series of external forces to retinal, allow one to extract retinal from bR once the Schiff base bond to Lys216 is cleaved,此为mov格式。