设A点为后视点,B点为前视点,A高程为90.127m,当后视读数为1.367m,前视读数为1.653m时,问高差hAB是多少?B点比A点高还是低?B点高程是多少?()
A: 0.286m.高.90.413m
B: -0.286m.低.89.841m
C: 0.286m.低.90.413m
D: -0.286m.高.89.841m
发布时间:2024-06-11 17:18:11