如图是用厚刻尺测量木块的长度,其中正确的测量图是( ) A.  

如图是用厚刻尺测量木块的长度,其中正确的测量图是(  )

A     B      C D

 

答案

B解:A、图中刻度尺没有从零刻度线处开始,读数时会不准确,所以A错误.

B、图中刻度尺放置方向与被测长度一致,且刻度紧贴物体,所以B正确;

C、图中刻度尺有一定的厚度,这样放置刻度不能紧贴物体,读数时会不准确,所以C错误;

D、图中刻度尺方向与被测物体方向不一致(倾斜了),所以D错误.

故选B

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