防护的科技性。就是现代人防工作一刻也离不开科学技术。第二次世界大战中,对城市的空袭主要由航空兵实施,基本手段多是飞机投掷炸弹,袭击目标以经济性的厂矿与人员并重,意在摧毁战争潜力。由于袭击手段与兵器均比较单一,空袭的技术性不是很高, Protection of science and technology. Is a modern civil air defense work can not do without a moment of science and technology. During the Second World War, the air strikes on cities were mainly carried out by air force. Most of the basic means were aircraft throwing bombs. The target of the attack was to lay equal emphasis on economic factories, mines and personnel in order to destroy the potential of the war. As the means of attack and weapons are relatively simple, the technicality of air raids is not very high,