单项选择题
A.0.1MPa B.0.2MPa C.0.3MPa D.0.4MPa
A.0.3~0.4MPa B.0.1~0.2MPa C.0.2~0.3MPa D.0.3~0.5MPa
A.0.05MPa~0.2MPa B.0.05MPa~0.1MPa C.0.1MPa~0.2MPa D.0.25MPa~0.3MPa