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BIM technology can be used to deal with these hidden dangers in time, thus reducing unnecessary losses, and can quickly respond to and deal with emergencies, and quickly and accurately grasp the operation of buildings. During disaster prevention and rescue in the operation and maintenance phase, real-time data access can be carried out by retrieving BIM database, and emergency response can be assisted in the virtual environment of BIM information model to accurately determine the location of danger. Detailed information can be provided before emergency personnel arrive.今日战场的巨鹿，相比等到秦军兵临城下，应当御敌于国门之外，以免我大楚百姓遭受了赵人同样的痛苦，不要受到兵祸侵袭。The following are some issues that everyone is concerned about. The handle, as shown in the following figure, has always been the interface between the interface and the Wii's handle interface.Discovery频道的8集FBI罪案调查剧《追缉：炸弹客 Manhunt: Unabomber》（原名《宣言 Manifesto》）确定在美国时间8月1日首播，首播集为两小时集。《追缉：炸弹客》由Kevin Spacey和Dana Brunetti担任本剧的执行制片人，执笔了本剧试映集的Andrew Sodroski也负责制作本剧。该剧根据现实改篇，大学炸弹客Ted Kaczynski是位大学数学教授，拥有167的高智商，以炸弹犯罪引致3死23伤。本剧主要讲述了FBI如何抓住那些声名狼藉的“优秀”罪犯，第一季将着眼于FBI探员Jim "Fitz" Fitzgerald（Sam Worthington饰），一个不习惯用老方法收集情报的专门语言学家。他用自己非传统的方法让藏匿了近20年的“大学炸弹客/隐形炸弹/Unabomber”被绳之以法，关键之处就在于他发现了“大学炸弹客”的真实身份可能隐藏在他的"宣言"中，而这个"宣言"也是Kaczynski众多阴谋之一。Paul Bettany饰演被称为“大学炸弹客”的Ted Kaczynski，而John Berchtold将饰演年轻时代的Ted Kaczynski。The above is only a model of "Long En" bicycle, If you need to generate other types of bicycles, Other subclasses can be written. The most important advantage of factory mode is that some of the same methods can be implemented. We can write code in the parent class for these same methods. If we need to implement specific business logic, we can rewrite the parent class's methods in the subclass to implement our own business logic. In terms of professional terms, there are two points: First, weaken the coupling between objects and prevent code duplication. Instantiating a class in a method eliminates repetitive code. Second: Repetitive code can be written in the parent class. Subclasses inherit all member attributes and methods of the parent class. Subclasses only focus on implementing their own business logic.We know that IPTables acts according to rules. Let's talk about rules. Rules are actually predefined conditions for network administrators. Rules are generally defined as "if the packet header meets such conditions, this packet will be processed in this way". The rules are stored in the packet filtering table in kernel space, specifying the source address, destination address, transport protocol (such as TCP, UDP, ICMP), service type (such as HTTP, FTP, and SMTP), and so on. When packets match the rule, iptables processes these packets according to the methods defined by the rule, such as accept, reject and drop. The main task of configuring a firewall is to add, modify, and delete these rules.