单项选择题
A.测距仪 B.多普勒甚高频全向信标 C.仪表着陆系统 D.无方向信标
A.Traffic Message Service-Broadcast B.Traffic Information Server-Broadcast C.Traffic Information Service-Broadcast
A.World Geodetic System B.World Geodetic mensuring System C.World Globle System D.World Globle mensuring System
A.1 B.2 C.3 D.4
微信扫一扫,加关注免费搜题