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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.6. Requirements for Silk Screen Printing and Solder Resistance失明后的白浅心灰意冷，在生下了夜华的孩子后，她孤身一人跳下了诛仙台，饮下忘情水，想要彻底结束这段孽缘。一晃眼百年过去，在东海，白浅再度遇到了夜华，一下子就认出了白浅的夜华决定抓住这次机会，重续前缘。Not only that, according to the intuitive feelings of the reporters of the NPC and CPPCC, the proportion of female reporters is far higher than that of men. In 2013, the number of reporters from Nanjing Metropolis Daily who went to Beijing was 11, and the ratio of men to women was miraculous 3: 8. Some people joked that the news war between the NPC and CPPCC used women as men.10. Quanzhou Erythrina Park电影《三变 山变》由彭兰玉执导，以改革开放40年为大背景，用纪录电影表现手法展示六盘水市各级党委政府以责任、担当和勇气带领全市各族人民群众是怎样开启脱贫攻坚之旅的，真实再现了“资源变资产、资金变股金、农民变股东”这“三变”改革探索中的鲜活故事，记录了在以习近平总书记为核心的党中央领导下，中国农村正在发生着的翻天覆地的变化。