标题: OG 12. 107. Which 指代 emission? [打印本页] 作者: shain 时间: 2010-11-1 19:13 标题: OG 12. 107. Which 指代 emission? Originally developed for detecting air pollutants, a technique called proton-induced X-ray emission, which can quickly analyze the chemical elements in almost any substance without destroying it, is finding uses in medicine, archaeology, and criminology.