单项选择题
A.0.45MPaB.0.50MPaC.0.55MPaD.0.60MPa
A.6.5mB.6.6mC.6.7mD.6.8m
A.5tB.8tC.12tD.15t
A.15mmB.16mmC.17mmD.18mm
A.7mmB.8mmC.9mmD.10mm
A.3sB.4sC.5sD.6s
A.3sB.4sC.8sD.9s
A.80°~100°B.90°~110°C.100°~120°D.70°~90°
A.60%B.70%C.80%D.90%