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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.　　没有人进去，也没有人出来。5. The unit at the district level shall communicate and confirm with the district social security, and issue the following written certificate (not required by the municipal level): A CA certificate issued by Nanjing Social Security New Office. RAR shall be filled in and stamped with the official seal.Why can poor Han Xin endure the humiliation of his crotch? Because he has a firm ideal of life. As Su Shi said: "When a common man sees humiliation, he draws his sword and stands up to fight. This is not courage. There are great brave people in the world. They are not surprised when they come, and they are not angry when they add it for no reason. The people they hold are very large and their ambition is far away."Here, the event is bound to the created fakeElement, then the event trigger is simulated (the event handler in this example is executed), and then the event binding is unregistered.