首页/ 题库 / [单选题]某钢尺名义长度为30m,检定时的实际长度的答案

某钢尺名义长度为30m,检定时的实际长度为30.012米,用其丈量了一段23.586m的距离,则尺长改正数应为( )。

单选题
2022-04-02 21:52
A、–0.012m
B、0.012m
C、–0.009m
D、0.009m
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正确答案
D

试题解析

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