格尔木至拉萨段(下称青藏铁路格拉段)全长1,142公里,平均海拔4,500米,沿线氧气只有海平面的50%～60%,年平均气温在零摄氏度以下,极端最低气温为零下45摄氏度,沿途穿越900多公里的冻土地带——这就是刚刚开通的青藏铁路的一些残酷数字,没有人会怀疑青藏铁路是人类 The Golmud-Lhasa section of the Qinghai-Tibet Railway covers an area of ​​1,142 kilometers with an average altitude of 4,500 meters. The oxygen level along the route is only 50% -60% of the sea level. The annual average temperature is below zero degrees Celsius and the extreme minimum temperature is minus 45 degrees Celsius. Crossing more than 900 kilometers of frozen land along the way - that is, some cruel numbers of the newly opened Qinghai-Tibet Railway. No one can doubt that the Qinghai-Tibet Railway is a human being