单项选择题
A.0.6~0.8Mpa B.0.2~0.7Mpa C.0.4~0.6Mpa D.0.5~0.6Mpa
A.±1mm B.±2mm C.±3mm D.±4mm
A.7mm,3mm B.8mm,3mm C.9mm,2mm D.10mm,1mm