客货共线铁路线间距,v≤120km/h区间双线线间最小距离为()。A.4200mm 发布时间:2017-06-30 07:10 │ 来源:www.tikuol.com 题型:单项选择题 问题: 客货共线铁路线间距,v≤120km/h区间双线线间最小距离为()。A.4200mmB.4400mmC.5000mmD.4000mm
题型:单项选择题 With respect to automatic identification systems(AIS),which information is required to be broadcast every 1 to 10 seconds().A.Call sign and IMO numberB.Course over ground and MMSIC.MMSI number and call signD.Route Plan and navigational status 查看答案