单项选择题
A.0.5B.1C.1.5D.2
A.高0.25mm 至低0.25mmB.高0.35mm 至低0.35mmC.高0.25mm 至平D.高0.35mm 至平
A.0.1-0.3B.0.1-0.4C.0-0.3D.0-0.4