现代社会,教育已由家庭个别教育、一次性的学校班级制教育发展成终身教育,继续教育已时不我待,势在必行。现代教育的发展趋势表明,学生在校期间获得的知识仅仅是知识长河中的一粟,大量的要靠在学校后获得。据美国麻省理工学院等5所著名理工科大学的调查,一般科技人员一生工作时间平均按45年计算,其所用的知识只有20％是在学 In modern society, education has been individualized by families. One-time school-based education has developed into lifelong education. It is imperative to continue education. The trend of modern education shows that the knowledge a student obtains during his / her school is only a drop in the long-term knowledge and a great deal of it depends on the school. According to a survey conducted by five well-known science and engineering universities such as the Massachusetts Institute of Technology, the average working hours of a normal scientific and technical personnel are calculated on the basis of 45 years on average. Only 20% of the knowledge they use is learned