单项选择题
A.高差法；视线高法 B.高差法；高差法 C.视线高法；高差法 D.视线高法；视线高法
A.6.19m；13.57m；150.71m；78.45m B.13.57m；150.71m；78.45m；6.19m C.78.45m；150.71m；13.57m；6.19m D.150.71m；13.57m；78.45m；6.19m
A.51°14′33″ B.102°29′06″ C.153°43′39″ D.204°58′12″