据美国联邦应急管理局和国家工程协会通过调查得出的报告说 ,世贸大楼倒塌的直接原因并非飞机撞击 ,而是大火。世贸大楼的建筑结构是非常坚固的 ,挺住了飞机的猛烈撞击 ,而其致命弱点是抗火能力没有人们想象的好。飞机撞击大楼后 ,世贸大楼内大火温度高达 10 93℃ ,所以即使是? According to a survey conducted by the Federal Emergency Management Agency and the National Engineering Association, the direct cause of the collapse of the World Trade Center was not an aircraft collision but a fire. The building structure of the World Trade Center is very strong, holding down the violent impact of the aircraft, and its lethal weakness is that fire resistance is not as good as people think. After the plane hit the building, the fire in the World Trade Center reached a temperature of 10 93 ℃, so even if it was?