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Conclusion: As the name implies, singleTop, if the current instance is at the top of the current task stack, it will be reused directly to test scenario 1. If the current instance is no longer at the top of the stack, create a new instance, such as Test Scenario 2, because it jumps from FirstActivity to SecondActivity every time. Although the SecondActivity instance already exists at the time of jumping to SecondActivity for the second time, another SecondActivity instance is created because it is not at the top of the stack.Attack-Life欢迎广大书友光临阅读，最新、最快、最火的连载作品尽在。At that time, it was quite confusing to see this bibliography. Mathematics was recommended from high school mathematics to mathematics analysis for mathematics majors. As soon as the computer algorithm class came up, it recommended the big "Introduction to Algorithms" and the theoretical "Data Mining: Concepts and Technologies". It was not suitable for such beginners. Reading should be ladder-shaped, and one cannot eat into a big fat man in one bite. Because I don't want "Daniel" to mislead people, I give the following suggestions:从害人不浅的发薪日贷款到尾气排放测试作假的汽车，这部调查类剧集揭露了企业厚颜无耻的贪腐行径。越国下一个目标自然也就是齐国第六四三章攻齐部署了，天下有四分之三的土地已经被越国占领，统一的诱惑之下，尹旭不可能放过齐鲁之地。抗日战争爆发后，中国的战局益发严峻。日本侵略军占领南京、济南后，为了迅速实现灭亡中国的侵略计划，连贯南北战场，决定以南京、济南为基地，从南北两端沿津浦铁路夹击徐州。 　　1938年3月16日，日军向滕县发动进攻，拉开了滕县保卫战-台儿庄战役的序幕。虽然在台儿庄取得大捷，但中国的抗日形势依然不乐观。日军占领了鲁西、苏北。国民党军向西南败退。共产党领导的敌后抗日活动却没有停止。1939年5月，八路军总部命令苏鲁支队向豫东，皖北发展，于是苏鲁支队该名为苏鲁豫支队。在苏鲁豫支队的影响下，鲁南的民间抗日也风起云涌。齐鲁大地自古便是英雄之乡，历来不乏血性儿女，英勇的齐鲁儿女在中国共产党的领导下积极展开抗日斗争。本剧描写的就是在此背景下鲁南地区党所领导的民间抗日的故事。 　　清末名侠夏迎风曾经参加过义和团灭洋运动，义和团失败后夏迎风隐身民间，在滕县乡下开了间武馆。三十多年后，因为日军侵华，夏迎风又不得不祭起夏家刀法…… 　　年关将近，正当夏家闭门过年时，一个浑身是血的青年男子闯进家门，原来是被日本人打