量取AB距离5次,结果分别为106.235m,106.240m,106.246m,106.249m,106.245m,则其平均值中误差为()mm。
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量取AB距离5次,结果分别为106.235m,106.240m,106.246m,106.249m,106.245m,则其平均值中误差为()mm。
A.0
B.±4.4
C.±4.9
D.±5.5
参考答案: