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Each component has its own coordinates, so if you want to adjust the coordinates of a map separately, the best way is to set it as a component.In the system, the client often needs to interact with multiple subsystems, which causes the client to change with the change of subsystems. At this time, the appearance mode can be used to decouple the client from each subsystem. Appearance mode refers to providing a consistent facade for a group of interfaces in the subsystem. It provides a high-level interface that makes the subsystem easier to use. For example, the customer specialist of Telecom can let the customer specialist complete the services such as charging telephone charges and modifying packages without interacting with various subsystems by himself. The specific class structure diagram is as follows:The chairman of MDT meeting is responsible for supervising the attendance of members so as not to affect MDT work and decision-making due to frequent absence.CN1, …我先前想着，要是皇上逼咱们，我就把你拐走呢。他下令出击，船队就退，一旦回港，船队又来。