随着计算机和网络技术的飞速发展 ,Ｉｎｔｅｒｎｅｔ已发展成为当前最大的信息资源系统 ,内容涉及各个领域 ,且操作简单、方便 .目前化学信息网络化日趋迅速 ,Ｉｎｔｅｒｎｅｔ上的化学化工信息资源十分丰富 .但如何从网上快速、准确地查到对自己有用的信息 ,是目前化学工作者 With the rapid development of computer and network technology, the Internet has developed into the largest information resource system in the world, covering various fields, and is simple and convenient to operate.Nowadays, the chemical information network is becoming more and more rapid and the chemical and chemical information resources on the Internet are very rich. But how to quickly and accurately find useful information from the Internet is the current chemical workers