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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.In the case of a reflection attack, An attacker uses a controlled host to send a large number of packets, What makes these packets special is that, The destination IP address points to the server, router, and other facilities that act as reflectors, while the source IP address is forged as the target IP address, When the reflector receives the data packet, it will think whether the data packet is requested by the attack target, so it will send the corresponding data to the attack target. When a large number of response data packets flock to the attack target, it will deplete the network broadband resources of the target, resulting in denial of service attacks.吕雉沉默不语，身上的衣服依旧的华丽，huā枝招展，与脸上的表情形成了巨大的反差。　　导演金正权毕业于首尔艺术大学电影系，在影片《好莱坞儿童的生涯》(1994)、《The Happenings》(1998)、《间谍李铁震》(1999)中担任导演助理。第一部长篇处女作为影片《同感》(2000)，凭借该影片首20世纪初，“孟河医派”传人沈蘅之，博采众家之长学习中医，先在家乡孟河开诊，后到上海行医。他以高尚的医德和精湛的医术，成为沪上名医。1920年，上海流行传染病“烂喉痧”，洋人医院趁机诋毁中医，提高药价，沈蘅之潜心研究出中医疗法，救治了大批贫苦病人，提振了中医声誉。然后四人进入一个包间。