标题: OG 12. 107. Which 指代 emission? [打印本页] 作者: teddyabc 时间: 2011-3-1 06:57 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.