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For collaboration files, it is not necessary to check out, as long as you have modification permission, you can modify them.-R.! I2 c; [5 i $w + e; } 9 G我就老脸皮厚地拿给他看了。"Ha ha ~ piglet is really smart! Piglet defeated wolf, piglet won!" Little Charlie was so happy that he raised his small hand excitedly and made a winning gesture.俄罗斯电视一台最新关于叶卡捷琳娜大帝的传记电视剧，由在《情迷彼得堡》当中出演黑森公主玛利亚闻名的玛丽娜·亚历山德罗娃主演Liskov Substitution Principle, LSP (Richter Substitution Principle) means that subclasses must replace their parent types. In other words, in the process of software development, after the subclass replaces the parent class, the behavior of the program is the same. Only when the subclass replaces the parent class and the function of the software is not affected can the parent class be truly reused, and the subclass can also add new behaviors to the parent class. In order to look at an example of violation of LSP principles, the specific code is as follows:在偶像团体中博得人气的少年，第一次遇到了自己发自内心的梦想——、