單項選擇題

自水準(zhǔn)點M(HM=100.000m)經(jīng)4個測站至待定點A,得;再由A點經(jīng)6個站測至另一水準(zhǔn)點N(HN=105.121m),得。則平差后的A點高程為:()

A.101.029m
B.101.013m
C.101.031m
D.101.021m

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