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The template method pattern consists of two parts, The first part is the abstract parent class, The second part is the subclass of concrete implementation. Generally, the abstract parent class encapsulates the algorithm framework of the subclass, including implementing some common methods and encapsulating the execution sequence of all methods in the subclass. The subclass can inherit the parent class and rewrite the methods of the parent class in the subclass, thus realizing its own business logic.If an event is no longer needed, we can delete it with a drop event statement. With this statement, we do not need to wait until the last event call.Almost all cellular phones must support multi-frequency and multi-radio. The spectrum allocation for global wireless communications has been redefined or redefined by relevant authorities. From a historical point of view, spectrum allocation has always been dominated by various countries, so it is not consistent in the world, because they are usually controlled by local governments. Unfortunately, the adjustment of spectrum is driven by the economies of scale of the industry, not by foresight in the field or cooperation between relevant institutions around the world. Without spectrum comparison, it is difficult to realize equipment standardization. As the wireless communication industry continues to allocate spectrum, it is foreseeable that different frequency bands will still follow localization requirements in the future instead of being optimized for global needs.于是，鲁三就跟着大小姐往户部去了。小葱分发了备用药物后，几个大的便安排了攻占地点，以何物代粮草，何处算大河，何地为深谷，何地为高岗，尽管是小儿嬉戏，也都装得像模像样。Application layer attackIn the first half of the year, many investigation reports of listed companies were detailed and the evidence was conclusive. They all gained great influence in the capital market and set a benchmark for the investigation reports of listed companies. The listed companies mentioned in the report, such as Hongte Precision and Happy Elevator, all filed investigations by the regulatory authorities after the interface news report. The reporter himself was also greatly threatened by his personal safety.