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【单选题】
某同学使用游标为 20 个小等分刻度的游标卡尺测量一物体的尺寸,得到图中的游标卡尺的读数,由于遮挡,只能看到游标的后半部分,图中游标卡尺的 ( )A.
50.15 mm
B.
50.06 mm
C.
53.15 mm
D.
51.15 mm
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