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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).Eighth fire facilities maintenance and testing institutions shall meet the following conditions:道光年间，"忆子成痴"的皇太后的一个梦，彻底改变了清宫两个女人的命运一场封后大典与一场殉葬大典并行，揭开了万凰之王的斗争序幕旻宁在封后大典上，突然得到大嫂--穆亲王福晋伊兰即将被殉葬的消息，自小对伊兰情根暗种的旻宁，当机立断，抛下满朝文武与准皇后，在千钧一发之际，救下了已经殉葬的大嫂伊兰！为了保伊兰的性命，旻宁编造了一个全天下人都无证据质疑的谎言，得以立伊兰为妃。伊兰家族与沅宛家族的命运，从此改变加之自己曾前去上蔡安葬李由，还道出单独请子夜前去祭拜的事情。FOX已续订《沉睡谷》第四季。不然。