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Since the single mode is instantiated only once, the first call returns an instance object of a. When we continue to call, the instance of b is the instance of a, so aa is printed below.　　故事围绕一家名为“鲍勃汉堡店”的餐厅展开，讲述店主鲍勃一家和邻里之间的有趣故事。这次他们遇到了大麻烦，汉堡店门口塌陷出大坑，鲍勃和琳达还得继续维持餐厅的生意。与此同时，孩子们也正试图揭开一个能帮助挽救自家餐厅的谜题。If an attacker sends SYN packets quickly with their own undisguised IP address, this is a so-called direct attack. This attack is very easy to implement because it does not involve spoofing or modifying packets below the user layer of the attacker's operating system. For example, he can simply send many TCP connection requests to implement this attack. However, for this attack to work, the attacker must also prevent his system from responding to SYN-ACK packets because of any ACK, RST, or ICMP (Internet? Control? Message? Protocol) will cause the server to skip the SYN-RECEIVED state (go to the next state) and remove the TCB (because the connection has been successfully established or recycled). Attackers can do this by setting firewall rules, causing the firewall to block all packets (except SYN) to reach the server, or causing the firewall to block all incoming packets so that SYN-ACK packets are discarded before reaching the local TCP handler.他何曾看过如此震撼浩大的战斗？。我们保持密切联系时所看到的是令人惊叹的人类戏剧。十年前，Piper大学毕业后结识了一名女毒贩Alex，与她成为恋人并随她环游世界，后来在她要求下参加了一次运毒行动。时过境迁，Piper离开了Alex，过上正常生活。一天，她和未婚夫被警方告知，十年前那桩贩毒案被破获，Piper遭到逮捕。Piper主动来到女子监狱服刑，为期15个月。面对监狱的新环境，初来乍到的Piper感到不知所措，糟糕的是她还不小心得罪了厨房负责人红姨，遭到红姨的报复。不仅如此，她还在监狱里重遇了昔日女友Alex。 　　在这座联邦女子监狱内，Piper遇到形形色色的女囚，第一次领略到“监狱文化”，她将要处理各种各样的问题。尽管认识了一群性格坦率的女囚犯，但她的牢狱生活绝不会一帆风顺……现代的女主Kadesurang是一位考古系学生, 精通泰国历史，还会法语，虽然身型肥胖, 但却有着一颗善良的心, 有着跟外表不一样的内在美。