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B) Design principles. Many people have listed seven principles, such as single duty principle, opening and closing principle, Richter substitution principle, dependence inversion principle, interface isolation principle, composite reuse principle and Dimit principle. LSP, I elevated it to one of the three cornerstones of the object-oriented paradigm; Single responsibility and interface isolation are mainly used as the principle of responsibility division in object-oriented analysis/OOA, which you can not pay much attention to at this time. Relying on the inversion principle, I throw it away as garbage, because the opening and closing principle or directly "relying on abstract type principle" already contains the essence of relying on the inversion principle, while the dross of relying on the inversion principle is inherited by IoC. Of course, the pullback, I emphasize very much. Therefore, you need to master the abstract dependency principle (OCP), one-way dependency principle (including the learning of callbacks) and the minimum dependency principle (composite reuse principle, Dimit rule).乖巧伶俐的红娘与莺莺主仆情深。两人正值花样年华，少女情怀，彼此都希望寻得好归宿。一次花灯盛会，红娘和君瑞分别拾得半边鸳鸯扣。二人寻寻觅觅，却始终缘悭一面。但当红娘对君瑞情根暗种、几乎可以打开缘份大门之时，命运却使缘份落在莺莺手上。相国夫人与莺莺、红娘来到普救寺还神。风雷寨一群山贼闯进寺中，掳劫莺莺，要挟相国大人，情势紧迫，如箭在弦。夫人许下承诺，能救莺莺脱险，莺莺便下嫁于他。适逢于寺内念书的君瑞仗义救人，舍命救出莺莺。莺莺与君瑞经过生死劫难，才子佳人一见钟情。红娘眼见缘份落在二人身上，但仍衷心为他们祝福，更认定君瑞与莺莺才是一对璧人，而自己不过是卑贱的丫环，根本配不上君瑞，因此红娘甘愿为二人牵上红线。此番救你出来，便是东城的主意，没有他极力让我保住你，咱们父子还没法团圆。一个小男孩在一群基于宝石的生物中取代了母亲的位置，必须学会控制自己的力量。1. Http://www.sucj.me/--SU Plug-in LibraryLying in the simulated incinerator, the arched LED lamp simulates the raging flame. When the temperature in the incinerator gradually rises, the experiencer Li Lei thinks of the picture of his deceased parents lying in the incinerator and feels the fear and loneliness that cannot be avoided.