单项选择题
A.0.5 B.0.7 C.1 D.1.5
A.不小于3mm B.不大于3.5mm C.不小于4mm D.不大于4mm
A.2+1mm B.2mm C.2±1mm D.3mm
A.0.4 B.0.6 C.0.8 D.1
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