Using calcium chloridize and sodium phosphate dibasic, this paper synthesizes hydroxyapatite having hexagonal system at 40 ℃.本文以氯化钙和磷酸氢二钠为原料,在40℃温度下合成了具有六方晶系的羟基磷灰石.Under proper condition the dibasic alcohol and bisphenol...
返回指定下标的字符.Returns the character at the specified index.在第2章,分析了粘连下标的主要特征,给出了一种新的投影方法.Chapter 2 analyzes some features of merged subscripts and presents a new projection method....