单项选择题
A.最大值,0.1mmB.最小值,0.01mmC.平均值,0.01mmD.平均值,0.1mm
A.2次,2~3mB.2次,3~5mC.3次,2~3mD.3次,3~5m
A.1.5mm 或3.0mmB.1.5mm或5.0mmC.2.5mm 或5.0mmD.2.5mm或7.0mm