单项选择题
A.2.6MPa±0.05MPa B.2.4MPa±0.15MPa C.0.2MPa±0.02MPa D.0.39MPa±0.02MPa
A.M6 B.M8 C.M10 D.M5
A.5~8℃ B.10~12℃ C.8~10℃ D.5~6℃