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[单选题]
每个测回角度观测值的中误差是±6‡,则六个测回角度观测值的最或然的中误差为()。
A.±1‡
B. ±2‡
C. ±2.4‡
D. ±6&Dagger
查看答案
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A.±1‡
B. ±2‡
C. ±2.4‡
D. ±6&Dagger
A.±8.3″
B.±3.4″
C.±6.3″
D.4.4″
A.±O.001
B.±0.002
C.±0.003
D.±0.004
A.82°19′21″
B.82°19′12″
C.82°19′30″
D.82°19′18″