书列出了AutoCAD的所有命令、功能介绍及其相关系统变量，十几个快速入门方法将有助于读者尽快掌握命令的使用。 本书命令齐全，查阅方便，是您案头必备的参考手册。-Book lists all the AutoCAD commands, functions and its related system variables introduced, more than a dozen methods of Quick Start will help readers use the command as