上月初，因人为错误导致两架大型飞机在德国南部1.2万米高空上发生了相撞事故，造成了70多人死亡，这起事故引起了人们对飞行安全起着决定性作用的空中交通管理系统高度的关注。 另一方面，随着社会生活节奏的加快，人们对出行也越来越多地追求方便快捷，因此，乘坐飞机也就成 Early last month, due to human error, two large aircraft collided over an altitude of 12,000 meters in southern Germany, killing more than 70 people, causing an air traffic control system that plays a decisive role in flight safety High degree of concern. On the other hand, with the accelerating pace of social life, people are also more and more easy to travel, so take a flight will become