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1. There are two options to manage the creation and destruction of state objects. The first is to create and then destroy state objects only when they are needed, and the other is to create all state objects from the beginning and never destroy them. If the state object is relatively large, the first method can be used to save memory, which can avoid creating some objects that will not be used and recycle them in time. However, if the state changes frequently, it is best to create all these state objects in the first place, and there is no need to destroy them, because they may be used again soon.学而时习之……杨长帆刚背了几个字就已经哑口了。一名因误杀罪被判十年徒刑的女子招募了一名年轻的公共辩护律师来帮助她的孩子。This case should be written here. It's not very comfortable.The sockstreet attack first completes the tcp three-way handshake the tcp connection is established, but in the last ack reply of the three-way handshake, the attacker sets its tcp window to 0 and then makes a data request. When the target discovers that the TCP window size at the receiving end is 0 when transmitting data, it will stop transmitting data and issue a TCP window probe packet to ask the attacker if its TCP window has been updated. Since the attacker does not change the size of the tcp window, the target will always maintain the tcp connection waiting for data to be sent and continuously carry out window update detection. If the attacker uses a large number of controlled hosts to carry out sockstreet attacks, the target will always maintain a large number of tcp connections and carry out a large number of window update detection, and its tcp connection table will gradually run out.与此同时，一个藏有邪恶力量的不明飞行物正以极高的速度接近地球，它所带来的外星人加莱克萨哈（瑞恩·威尔森 Rainn Wilson 配音）扬言要摧毁地球，毁灭人类。人类奋起反抗，但是他们的武器在加莱克萨哈面前全部败下阵来。地球危在旦夕，人们把命运寄托在了苏珊及其怪物朋友的身上……刚从复旦大学毕业的许诺（瞿颖 饰）好不容易拦上一辆出租车，今天是她去威臣大广告公司最后一道面试的大日子，但是向来迷糊的许诺竟把最重要的文件落在家里了，急中生智的许诺向旁边同样堵塞在路上的私家车的主人借用电话， 高积安（胡兵 饰）犹豫了一下把电话交给她，谁知瞬间出租车开动，连人带手机消失在眼前。