它允许在你的Fireworks文档中创造简单的3D物体或原型，下面的键允许你删除或选择一个帧： “D”键 “Backspace”键 "Delete" 键 -It allows to create simple 3D objects or prototypes in your Fireworks document, the following key allows you to delete or select a fr a me: the "D" "Backspace"