單項選擇題

如圖所示;用游標深度尺測得55°的燕尾槽的深度是40mm,用直徑為30mm的圓棒做測量棒,測得兩圓棒之間的距離為20.40mm,求燕尾槽槽底A和槽口B的寬度()。

A.102.36mm,56.17mm
B.115.40mm,53.80mm
C.77.60mm,48.20mm
D.108.03mm,52.02mm


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