#头条讲真的#一场大雪，滞留了许多人回家的路和铁路春运正常的节奏，因为冻雨使部分高铁受电弓无法正常供电而导致高铁低速运行或者瘫痪在铁轨上。于是内燃机车拉着动车组跑的画面进入人们视野，同时早已退出历史舞台的蒸汽机车也成了人们议论的热点。
abstract : To clarify what energy and power engineering does， what does it solve， and what does it do， the author combines the course content and some materials， and thus obtains some understanding of the major.
