题目内容
(请给出正确答案)
[单选题]
已知水准点高程HA=43.251m,测得后视读数a=1.000m,前视读数b=2.283m。则视线高H,A点至B点的高差hAB和待求点B的高程HB分别为()。
A.45.534m.+1.283m.44.534m
B.40.968m.-3.283m.39.968m
C.44.251m.-1.283m.41.968m
D.42.251m.+3.283m.46.534m
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A.45.534m.+1.283m.44.534m
B.40.968m.-3.283m.39.968m
C.44.251m.-1.283m.41.968m
D.42.251m.+3.283m.46.534m
A.填高
B.挖深
C.不填高也不挖深
D.以上都有可能,视情况而定
A.45.534,43.251
B.40.968,38.685
C.44.251,41.968
D.42.251,39
如图所示,已知水准点BMA的高程为33.012m,1、2、3点为待定高程点,水准测量观测的各段高差及路线长度标注在图中,试计算各点高程。要求在下列表格中计算。
A.74.769m
B.70.121m
C.-74.769m
D.-70.121m