未分类题

对一角度观测四回，各测回观测值与该角度的真值之差分别为-9'、+8'、+7'、-6'，则角度测量的中误差为( )。
D.±8.8'

A.0
B.±7.5'
C.±7.6'

【参考答案】

C
解析：

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对一角度观测四回，各测回观测值与该角度的真值之差分别为-9'、+8'、+7'、-6'，则角度测量的中误差为( )。D.±8.8'

对一角度观测四回，各测回观测值与该角度的真值之差分别为-9'、+8'、+7'、-6'，则角度测量的中误差为( )。
D.±8.8'