画图程序，包括椭圆、直线矩形等，可以方便的拖拉移动，并支持选中目标以删除、复制等操作

画图程序，包括椭圆、直线矩形等，可以方便的拖拉移动，并支持选中目标以删除、复制等操作-Drawing procedures, including oval, rectangular straight line, to facilitate movement of the tractor and to support the goals selected to delete, copy, such as operation