單項選擇題碎部測量時,對地物應(yīng)測定其輪廓的轉(zhuǎn)折點,地物凹凸部分在圖上小于下列數(shù)值可按直線處理:()

A.0.4mm
B.0.5mm
C.0.6mm
D.0.7mm


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