草莓榴莲18勿进

ACTION_UP: The moment the finger is released from the screenAnswer: The similarity of these three modes is that they all serve as an intermediate layer between the client and the real used class or system, which plays the role of allowing the client to indirectly call the real class. The difference is that the application occasions and intentions are different.特七看着血痕咽了口吐沫：佩服。郑氏和小葱拉着玉米的手。In fact, the name of each mode indicates the function of the mode. The agent mode is to have one more agent class to carry out some operations for the original object. For example, when we rent a house, we go back to find an intermediary. Why? Because you do not have a comprehensive grasp of the housing information in this area, I hope to find a more familiar person to help you do it. This is what the agent here means. Another example is that we sometimes engage in lawsuits, we need to hire lawyers, because lawyers have expertise in law and can operate for us and express our ideas. Let's look at the diagram first:假如有一天，你的亲人对你说，他不是你的亲人，你真正的亲人在另一个地方，你必定会去找你真正的亲人，可是，你找到亲人后，发现他们并不需要你，甚至，还觉得你是个累赘，而他们也有自己的家庭后，你会怎么想呢？User1. Work ();