宋代文学家朱熹在《观书有感》中写道:“问渠那得清如许?为有源头活水来。”随着社会的发展,人类知识的总量在不断增加。在知识激增、竞争加剧、科学技术日新月异的今天,人们要适应不断发展变化的新生活,唯一的途径就是自学。因此,联合国教科文组织在关于生存的主题报告中警呼:“未来的文盲,不是不识字的人, Writer Zhu Xi in the Song Dynasty wrote in his book View: ”What can we do when we ask for a living?“ With the development of society, the total amount of human knowledge is constantly increasing. Today, with the proliferation of knowledge, intensified competition and ever-changing science and technology, people have to adapt themselves to the constantly changing new life. The only way is to learn by themselves. Therefore, UNESCO in his thematic report on survival calls: ”The illiterate in the future is not illiterate people,