很多人认为，火灾中人员死亡的主要原因是被火烧死。其实不然，火的伴生物烟，才是致死的主要原因。建筑物起火后，大多数受灾者首先见到的是烟，烟的迅速蔓延会恶化疏散条件，使受灾者呼吸困难，心率加快，判断力下降，造成恐慌心理。烟中的毒气和缺氧，还会给受灾者在短时间 Many people think that the main reason for the death of a fire officer is that it has been burnt to death. In actual fact, the fire with the biological tobacco, is the main cause of death. After the fire in buildings, most of the victims first saw the smoke. The rapid spread of smoke would worsen the evacuation conditions, make the victims suffer from difficulty in breathing, speed up their heart rate, decrease their judgment and cause panic. The gas and oxygen in the smoke, but also to the victims in a short time