Firs,spruces and pines are conifers.冷杉、云杉和松树都是针叶树。Her firs big break came alongside Jane Russell in Gentlemen Preferred Blondes.她的冷杉很大的突破与简·里先生来金发碧眼的首选.Firs, spruces and pines are conifers.冷杉 、 云杉和松树都是针叶树.Pines, firs, an...
摘要建立了异辛酸合成过程中异辛醇、异辛酸和酯的气相色谱分析方法.A gas chromatography method for the quantitative analysis of isooctyl acid was introduced in this paper.异辛醇磷酸酯盐与其它助剂复配后,可明显提高其耐碱性.The ethylhexyl p hosphate salt markedly raised the alkali ...