关干产业划分问题．从历史上看，人类社会已经经历了四次产业革命。第一次，农业的出现；第二次，手工业的产生；第三次，机器工业的兴起；第四次，以高技术为主导的现代产业的发展。所谓高技术；包括：微电于、激光、基因工程、超导体、梭能等等。 Concerned about the division of industrial issues. Historically, human society has undergone four industrial revolutions. The first was the emergence of agriculture; the second was the emergence of handicrafts; the third was the rise of machinery industry; and the fourth was the development of a modern industry dominated by high technology. The so-called high-tech; include: Microelectronics, laser, genetic engineering, superconductor, shuttle energy and so on.