亚洲国产日韩欧美综合专区

The Liskov Substitution Principle (LSP) is one of the basic principles of object-oriented design. The Richter substitution principle says that wherever a base class can appear, subclasses can certainly appear. LSP is the cornerstone of inheritance reuse. Only when derivative classes can replace base classes and the functions of software units are not affected can base classes be truly reused, and derivative classes can also add new behaviors to base classes. The Richter substitution principle is a supplement to the "open-close" principle. The key step to realize the "open-close" principle is abstraction. The inheritance relationship between the base class and the subclass is the concrete realization of abstraction, so the Richter substitution principle is the specification of the concrete steps to realize abstraction. --From BaiduCS1, …Stephen would have explained solemnly that he was not a magician at ordinary times, but when he looked up to see the bearer, he froze first. He did not perform his "first" meeting with Tony Stark in his mind. There were hundreds or even tens of thousands of kinds, but this was definitely not the case.100,000 Yuan Liang Zhou Hongmao Medicated Liquor Series Investigation Editor: Wang Qiang Liu Haichuan"Later things became more serious, The Vietnamese army attacked more than seven or eight times in a row. But it was almost halfway through the fire of the artillery group. Occasionally, sporadic ones escaped gunfire, Can't hide from our accurate shooting, Because the explosive power of the shells is very large, Apart from being killed by shrapnel at a long distance, It is normal for those who are closer to me to be blown to death without a whole body. At that time, because of the open terrain on our side, So the superior is more 'generous', In order to better understand the enemy situation and give full play to the terrain advantage of position 142, All the front-line officers and soldiers in our squad leader and above positions are equipped with binoculars, which is absolutely not treated in other positions. If other positions want to have their own binoculars, they have to be a deputy platoon leader. As a squad leader like me, I am still very proud to be able to observe the enemy's situation with binoculars.以贾富贵和郑奉时这对一仆一主同父异母兄弟与二十世纪同行生命情感历程为主体线索有代表性历史时期和历史事件横断面上着力刻画出们亲情、友情、爱情、良知、希望、仇怨等等方面所经历悲欢离合展现了即将过去二十世纪--这个给中国带来了翻天覆地变化历史进程中有着优秀文化传统和强烈变革意识中国人对于人生真情追求和对人性真谛恪守。本剧两位主人公富贵和奉时出生于1900年八国联军攻陷北京城枪炮声中们有着迥异社会地位、性格特点和人生价值观念。作为不知自己身世仆人之子富贵从小便练就了一身做生意本领培养出本份、诚实和忍让性格而奉时作为东家少爷热情奔放、正直善良总沉醉艺术梦境中表达着自己对美好理想追求。漫长而又富有传奇色彩一生中们和自己家人经历了军阀混战、革命、抗战、解放、新中国诞生和成长围绕着利益和情感这个核心家庭与社会、现实与理想、新与旧、美与丑、生与死、良知与苟且矛盾选择面前们兴奋、期盼、痛苦、冲突演绎出一幅幅真实而又感人生命图景。