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This is the basis of the opening and closing principle, and the specific content: interface-oriented programming, relying on abstraction rather than concreteness. When a specific class is used when writing code, it does not interact with the specific class, but interacts with the upper interface of the specific class.A study conducted by some German scientists in 2014 shows another important fact about psychological representation. The study focused on indoor rock climbing. This sport is specially used to imitate outdoor rock climbing and is also used as a training method for outdoor climbing. Climbers must use various handles to climb a vertical wall. These handles require a variety of grip methods, including open grip, pocket grip, side grip, and wrinkle grip. If you use the wrong grip method on the handle, you are likely to fall off the wall.2. The following is the written Dockerfile v1 version:他直起身子，将秦淼扶正了，凝视着她的眼睛，认真道：别瞎想。紫茄忙点头，小手扯了半天，却没弄下来，急得要去折断那茎秆。六公主看到吕洞宾，同样高兴不已，吕洞宾前世是东化帝君，这一世转世重修，又拜入老子门下。