单项选择题
A.两个以上龄期内B.三个以上龄期内C.五个以上龄期内D.一个以上龄期内
A.72h±15minB.72h±30minC.72h±60minD.72h±45min
A.0.1MPa,0.1MPaB.0.01MPa,0.1MPaC.0.1MPa,0.01MPaD.1MPa,1MPa