ss选择易，cad环境加载使用。

命令ss，可以弹出对话框，比较直观的按选择多项特性选择图元(可框选范围或全图范围)。简单的理解就是快速选择的简化版。-ss Easy, cad loaded using the environment. Command ss, can pop up dialog box, more intuitive selection by selecting multiple characteristic elements (or can range marquee full extent). This simply means that quick selection Starter Edition or a fool.