《PR.doc》查看内容详情
亲,网页上所展示的文章内容和下载文档内容是一致的,下载前请点击“查看内容详情”确认是否您所要下载的内容。
abbr.公共关系(public relations);性能要求(Performance Requirement);[化](=praseodymium)镨; 英英释义: PR[ ,pi: 'a:(r) ]n.a soft yellowish-white trivalent metallic element of the rare earth group; can be recovered from bastnasite or monazite by an ion-exchange process同义词:p