管子与法兰对接时，封闭管段法兰螺栓孔对称水平度允许偏差是1.6mm。此题为判断题(对，错)。

A.±0.5mm

B.±1.2mm

C.±1mm

D.±1.5mm

A.50mm

B.75mm

C.100mm

D.125mm

A.对称均匀，平行

B.按顺序挨个，平行

C.对称均匀，垂直

D.按顺序挨个，垂直

A.1mm

B.1.2mm

C.1.4mm

D.1.6mm

A.1mm

B.1.2mm

C.1.4mm

D.1.6mm