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二更求粉红订阅，下更十一点半。Let me explain the role of these classes: MySubject class is our main object, Observer1 and Observer2 are objects that depend on MySubject, and Observer1 and Observer2 must change when MySubject changes. The AbstractSubject class defines a list of objects to be monitored, which can be modified: add or delete monitored objects, and when MySubject changes, it is responsible for notifying the objects that exist in the list. Let's look at the implementation code:馨姐，我知道你嫌我年龄小。Added flap adjustment F F-"If the situation develops in this way, it is also to find the weakness of this" killer bee "? As long as we grasp our weaknesses and require our superiors to equip them with more flame throwers, will the situation be much better? Or can you use these 4 74 flamethrowers to attack these "killer bees" more effectively and hold the position more easily than this first encounter with "killer bees"? "I asked.Step: Tianzheng is drawing topographic maps-setting elevation values for each contour line in the attribute interface-drawing other elements, such as road squares, plant sketches, etc. Set up different blocks in different types to facilitate the operation after entering SU-import SU-select contour line part and use sandbox.张大栓等人本还不忍，见实在有趣，越不让他们吃了。