问题:
A.φ26mmB.φ26.5mnC.27mmD.φ27.5mm
问题:
A.φ35mmB.φ34.5mmC.φ34mmD.φ33.5mm
问题:
A.φ37mmB.φ38.5mmC.φ39mmD.φ39.5mm
问题:
A.100kPaB.140kPaC.170kPaD.160kPa
问题:
A.550kPaB.500kPa或600kPaC.450kPaD.600kPa
问题:
A.5kPaB.10kPaC.15kPaD.20kPa
问题:
A.1minB.2rnnC.3minD.4min
问题:
A.300kPaB.500kPaC.750kPaD.900kPa
问题:
A.φ80mmB.φ90mmC.φl00mmD.φ120mm
问题:
A.70mmB.75mmC.80mmD.90mm
问题:
A.160kPaB.170kPaC.1801xPaD.190kPa