单项选择题
A.0.8s B.0.9s C.1.39s D.1.94s
A.5mm~6mm B.6mm~7mm C.7mm~8mm D.8mm~9mm
A.1.0mm±0.5mm B.1.3mm±0.5mm C.1.5mm±0.2mm D.1.5mm±0.5mm