To investigate the accumulation and phytotoxicity of technical hexabromocyclododecane(HBCD)in maize,young seedlings were exposed to solutions of technical HBCD
摘 要:本文通过回顧笔者参与“庆阳坝凉亭街保护”项目的过程,提出关于中国古村落保护实践中的两个问题:即如何对保护对象进行价值判断和采取怎样的保护态度。 关键词:聚落 建筑遗产 原真性 保护 Abstract: By reviewing the project of “protection of pavilion Street in Qingyang Village” the author pr