Based on the statement of the change and development trend of library reference consulting service, the paper discusses the role orientation of reference librarian.
本文在阐述信息时代图书馆参考咨询服务变化和发展趋势的基础上，对参考馆员的角色定位进行了探讨。
This article narrates the change of Chinese automobile coating materials market and the present status of international automobile coatings; and analyzes the trend of their development.
介绍了我国汽车用涂装材料市场的变化，以及国内外车用涂料现状，并对汽车涂装材料的发展趋势进行了分析。
Population is the main of market. The change of population age structure will bring change of consuming demand and development trend.
人口是市场的主体，人口年龄结构的变动必然也会引起市场的消费需求和发展趋向的变化。
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