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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.《保卫孙子》由银润传媒集团投资出品，实力导演沈航担纲执导，潘虹、高洋、魏巍、方子春、王华英、李沁、刘智扬等领衔主演。老戏骨潘虹此次将出演女一号奶奶一角，亲手为观众独创现代版《孙子兵法》，以三十六计告诉观众如何突围赢得孙子心。故事围绕一个孩子，六个大人来抢。爷爷奶奶有“溺爱”孙子的理由，姥姥姥爷亦有“惯”外孙的权力。儿子、媳妇对这种“超级关怀”不无忧虑，但是又常常奈何不了。爷爷奶奶们要争夺对孙子的“控制权”，爸爸妈妈要行使对儿子的“教育权”，一场围绕着“保卫孙子”的家庭战争硝烟四起。A large number of SYN requests cause the unconnected queue to be full, making the normal TCP connection unable to successfully complete the three-way handshake. This pressure can be relieved by increasing the space of the unconnected queue. Of course, backlog queues need to take up a large amount of memory resources and cannot be expanded indefinitely.陈娟的奶奶煮饭点柴火时不慎引燃了周围柴草火势迅速蔓延，正在不远处走访的村妇联刘主任急忙带人奔跑过来……Blessing does not come from the outside, but from the inside. If a person enjoys real blessings, or the blessings of all kinds of children in the world, he must have the virtue of enjoying blessings in order to maintain prosperity and prosperity. In front of blessed people, a jar of clear water will turn into snow-white silver. In front of those who should not enjoy good fortune, a jar of silver will become a jar of clear water. There is not much nonsense in reading notes. First, let's talk about formulas and conclusions. Take Ying Long as an example.Column Introduction: Zhengda Variety Show has a large number of film sources. The film is the eternal brand of Zhengda Variety Show. In the new version of Zhengda Variety Show, the film is still the main section of the column. Therefore, while preserving the original columns such as "The World Is Wonderful", new columns such as "Guinness World Records" and "Action X" have been added. "Zhengda Variety Show" has been the brand column of the channel it broadcasts since its debut, with a very distinctive personality and stable ratings. First broadcast time: 18:00 every Sunday, rebroadcast time: 12:30 every Monday, and 09:30 every Sunday, and solo broadcast channel: CCTV-1