用钢尺两次测量某一长度值,分别为114.256m和114.222m,则测量值和精

练习题库2022-08-02  67

问题 用钢尺两次测量某一长度值,分别为114.256m和114.222m,则测量值和精度为(  )。A. 114.239m,1/3360 B. 114.229m,1/67200 C. 114.256m,1/3360 D. 114.222m,1/67200

选项 A. 114.239m,1/3360
B. 114.229m,1/67200
C. 114.256m,1/3360
D. 114.222m,1/67200

答案 A

解析 由题分析得,测量值应为两次测量的平均值:(D1+D2)/2=114.239m。钢尺的测量精度为:
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