建筑接近限界，规定了保证机车车辆安全通行所必须的横断面的（）。（B、3、X）[05-00-01-02][020102] ["最大尺寸","最小尺寸","尺寸","面积"]
英译中：Market orientation
列车中相互连挂的车钩中心水平线的高度差不得超过（）。（A、3、Y）[05-00-01-04][010201] ["70mm","75mm","85mm","100mm"]
快运货物列车为快速运送鲜活、（）及其他急运货物的列车。（B、4、Y）[05-00-02-01][020103] ["易燃","易腐","易碎","易爆"]
货运五定班列既：定点、定线、（）、定时、定价的列车。（B、4、Y）[05-00-02-01][020103] ["定方向","定车次","定货物","人员"]
英译中：Logistics engineering
