为探究吕家坨井田地质构造格局,根据钻孔勘探资料,采用分形理论和趋势面分析方法,研究了井田7......

The foundation of any network management systens is a database that con-tains information about the network resources re......

Classes are the basic modules in object-oriented (OO) software, which consist of attributes and methods. Thus, in OO env......