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　　天磊不忍托累好心的嫂子，偷偷服毒自杀，被金月发现送进医院抢救过来，使宝乐婶心灵受到巨大的撞击，决定挣钱帮天磊治腿，解救金月。从医院回来的路上得知大贵与媳妇美玉闹离婚。她与亲家母小算盘劝儿女不成，二人都为大贵和美玉共存的三万元钱争执不休，反目成仇。万般无奈下，美玉偷出母亲藏在柜下的存折，还给了宝乐婶，虽解决了风波，却为日后留下了祸根。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 BaiduIt has been a month since the end of the three rural areas. Looking back on that unforgettable day, I feel a lot, leaving us not only moved but also grown up. Compared with before, I feel that I have grown up a lot and become more mature, brave and confident. Life is so generous to me that when I give a little, I have gained a lot and learned a lot about how to deal with people. And these are all indispensable wealth in my life. In order to make our "Three Rural Areas" brand activity better, we have made full preparations for this activity. The main information covers the following six aspects:Dry goods, praise one　　日军对淀心庄报复性扫荡，丁大水和新婚妻子双双遇害，赶来救援的老魏却误入“鬼打墙”迷宫，耽误了救援，丁水妹对他的误会进一步加深。