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? AWB: Default Automatic White Balance丧，在父亲的逼迫下，在佳木斯伪警察局任职。杜雪颜受党指派利用特殊家庭关系回佳木斯为抗联工作。她很快打开局面，配合抗联五军搅得日伪坐卧不宁。完成任务后杜雪颜回到抗联，任女子连指导员。她带领姐妹们坚持三江斗争，面对面地与敌人浴血奋战，成长为巾帼英雄。最后为掩护大部队转移，杜雪颜带女子连主动将敌引向相反方向，绝境中她们宁死不屈，最终全部壮烈牺牲 。+= is to inform you when this event occurs, and -= is to inform you no longer when this event occurs.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 Baidu手掌三动。《养生堂》，中国电视健康第一品牌，同时也是广电总局健康养生标杆栏目、北京电视台王牌栏目。栏目始终秉承“献给亲人的爱”的宗旨，开播11年以来，以权威性、科学性、服务性和普及性的栏目特点，影响着、引领着亿万中国人的健康观念和生活方式，成为中国最大的全民普及健康课堂。