应用实体选择方法

当提示您指定对象时，输入下表中的一个选项（或括号中的快捷键）。

窗口(W)	指定完全位于由两个对角点定义的矩形内的所有实体。
	A rectangular selection Window is defined by two opposite corner points. Position the pointer on the first corner of the selection window and click that point. Click on the second corner point to specify all entities located entirely within the window.
交叉(C)	指定由两个对角点定义的矩形内的对象。这些对象可以延伸到矩形之外。
	When specifying entities using the Crossing method, entities whose outlines intersect or lie within the window are selected. Position the pointer so that its window includes or intersects the desired drawing entities.
多边形窗选 (wp)	指定完全位于由指定点定义的多边形内部的实体。
	Like the Window mode, the Window Polygon mode specifies all drawing entities whose contours lie entirely inside the selection window. Unlike the Window mode, the Window Polygon mode lets you sketch an irregular window with unlimited corner points. To use WPolygon, define the corner points for the selection window. Polygon lines can intersect themselves and form loops. Press Enter to complete the selection window. All entities that lie totally inside of the window are selected.
CPolygon (cp)	指定由指定点定义的多边形内的对象。这些对象可以延伸到多边形之外。
	The Crossing Polygon selection mode also creates an irregularly formed window with unlimited corner points. All entities positioned inside or intersected by the selection polygon are specified. Define corner points for the selection window. The preview mode shows the emerging polygon. Polygon lines can intersect themselves and form loops. Press Enter to complete the selection window. All entities within and intersecting the crossing polygon are specified for modification.
栏选(F)	指定所有穿过您所确定围栏的实体。围栏方法类似于 CPolygon，只不过围栏不闭合。
	The Fence mode is an effective variant of a crossing selection mode. The entities to specify are not enclosed or crossed by a window, but instead are "cut through" by a line, or "fence". Define the fence with unlimited points. The fence can intersect itself. Press Enter to complete the fence. All entities that intersect the line are added to the selection set.
上一个(P)	重新指定最近的实体选择集。
The Previous option restores the previous selection set. Note: As with the Last and All methods, entities on a frozen Layer are not selected, and entities on a locked Layer are selected but cannot be handled.
最后一个(L)	指定最近创建的可见实体。
The Last option adds the last drawn entity to the selection set. Note: If the last drawn entity is located on a frozen Layer, no entity is selected.
对象组(EG)	指定某个指定对象组内的实体。
The EGroup option selects the entities of an EntityGroup specified by the group's name. Create EntityGroups using the EntityGroup command.
添加(A) / 移除(R)	在添加模式（默认）与移除模式之间切换。
The Add option is the default mode, letting you specify entities and add them to the selection set at any time. The Remove option instead removes previously selected entities from the selection set. Remove mode changes the entity selection prompt to Remove Entities. Entities already selected are removed from the selection set if they are selected again.
撤消(U)	取消选择最近选择的实体。
撤消选项可撤销最近的选择。
所有(ALL)	指定所有图层上的所有对象。
所有选项选择图形中的所有对象，冻结的图层上的对象除外。
单选(SI) / 多选(M)	在单选和多选方法之间切换。
With Single mode, you specify one entity, then entity selection completes. With Multiple mode, you select entities by specifying multiple points without highlighting the entities. Multiple mode also selects two intersecting entities even if the intersection point is chosen twice.
自动(AU)	切换到自动模式，在该模式下，指向某个对象将选择该对象。指向一个空位置将启动一个对象选择框。
自动和**所有**是用于对象选择的默认模式。
框选(BOX)	框选。通过结合窗口和交叉选择方法的指针来指定实体。如果从右到左指定选择矩形的对角点，则“框选”等效于“交叉选择”。否则，“框选”等效于“窗口选择”。
	从左到右绘制窗口可选择选择窗口内的实体。 从右向左绘制选择窗口将指定选择窗口内以及与选择窗口相交的实体。

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