17、RNP程序数据应基于__系统? The data of RNP procedure is based on ___ co

17、RNP程序数据应基于__系统? The data of RNP procedure is based on ___ coordinate.

A.WGS-84坐标 WGS-84;

B.北京54坐标 Beijing-54;

C.2000国家大地坐标 2000 the national geodetic coordinates;

正确答案是A