考试是社会进步和人类文明的产物。能否以健全的考试制度、机会均等的原则和科学规范的程序选拔人才,可以体现社会文明的程度和发展水平,也是衡量一个国家安定团结的重要标志。作为考试中的重要环节之一就是试卷的编制,它应准确的体现考试目的。由于国家教委考试中心加强了高校入学考试制度的改革和研究。化学科命题专家注重了化学模式的研究,几年来的化学试卷无论是在整体设计、难度和区 Examinations are the product of social progress and human civilization. Whether or not talents can be selected through a sound examination system, equal opportunity principles, and scientific and normative procedures can reflect the degree of social civilization and the level of development. It is also an important indicator of the stability and unity of a country. One of the important links in the examination is the preparation of the test paper, which should accurately reflect the purpose of the test. As the National Education Commission Examination Center has strengthened the reform and research of college entrance examination system. The chemical subject proposition expert pays attention to the study of the chemical model. In the past few years, the chemical test paper has been in the overall design, difficulty and area.