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The function of the intermediary mode is to remove the coupling relationship between objects. After adding an intermediary object, all related objects communicate through the intermediary object instead of referencing each other. Therefore, when an object sends a change, only the intermediary object needs to be notified. Intermediaries loosely couple objects and can independently change their interaction.B women: foil individual, foil group, epee individual, epee group.The maintenance and testing institutions of fire-fighting facilities with secondary qualifications can be engaged in the testing, repair and maintenance of fire-fighting facilities for buildings with a single building area of less than 40,000 square meters, factories and warehouses with fire risks of less than Class C. Fire safety assessment institutions with secondary qualifications can engage in fire safety assessment of social units and consulting activities on fire laws and regulations, fire technical standards, rectification of general fire hazards, etc.The application of Shuangkai focuses on high-quality product experience: concise and clear interface design; Support application transformation to protect your privacy in details; There is no advertisement in the whole process of use. The double-opening application has stable performance and smooth use.我二人吓坏了，心想这孩子八成被野兽吃了……回来半路上，就看见了这个孩子。Large traffic attacks saturate the bandwidth and infrastructure of the network through massive traffic and consume them completely, thus realizing the purpose of flooding the network. Once the traffic exceeds the capacity of the network or the ability of the network to connect to other parts of the Internet, the network will not be accessible, as shown in the above figure. Examples of heavy traffic attacks include ICMP, fragmentation, and UDP floods.