A method of synthesis of butyl isobutyrate catalyzed by amidosulphonic acid has been studied.以氨磺酸为催化剂催化合成了异丁酸丁酯,确定了酯化优化条件.The method about synthesis of approximate straight line motion mechanism based on moving centrode ...
Case study method first originals from the 19 th century.案例研究方法最初起源于19世纪系统使用的个案研究.At a concrete case study for the detail use is given.本文还结合实例予以具体应用.A case study approach has been employed for this research.这个研究采用了案例研究的方...