一、引言　　每个时代都有其主流行业,20世纪初的石油、铁路业是决定当时社会进步的主力,60年代的汽车业,70年代的金融业,80年代的微电子业都深刻地改变了当时的企业结构和经济结构。到了90年代西方发达国家的经济发展比以往任何时候更依赖于知识的生产、扩散。许多国家把发展? I. Introduction Each era has its own mainstream industry. The oil and railway industry in the early 20th century was the main force that determined the social progress of the time. The automobile industry in the 1960s, the financial industry in the 1970s, and the microelectronics industry in the 1980s all profoundly changed The then corporate structure and economic structure. By the 1990s the economic development in the developed western countries was more dependent on the production and proliferation of knowledge than ever before. Many countries put development?