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For interface programming, a lot of changes that may occur in the system in the future can be isolated. Why? If the code is written for an interface, he can implement the interface with any new class through polymorphism. However, when the code uses a large number of specific classes, once new specific classes are added, the code must be changed. Violating the opening and closing principle.The new BMW 3 Series adopts hydraulic bushings with higher cost but better shock absorption effect at the connection points between most suspension and key parts. For models at this price, there is nothing wrong with using hydraulic bushings.说完意有所指地瞟了眼黎水。Techut是一名特工上校，他得伪装成间谍进行工作。Awassaya是个时尚名人，由于误会一直想要揭露他的真面目。Techut想要阻止恼怒的女孩毁掉自己的任务，但当Awassaya意识到他就是那个“对的人”后，她依旧继续打扰着他。当爱情意外降临时，他要怎么做呢？在他救了她许多次以后，她还能否认自己对他的感觉吗？听闻此言。这……何永强皱眉不喜，冲杨长帆道，这下人太不讲规矩了，在我府里要吃板子的。