单项选择题X 纠错
A.0.6m2B.0.7m2C.0.8m2D.0.9m2
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单项选择题
A.φ14B.φ15C.φ16D.φ17
A.0.7m2B.0.5m2C.0.4m2D.0.3m2
A.2倍B.3倍C.4倍D.5倍
A.32mm或38mmB.22mm或28mmC.20mm或30mmD.35mm或45mm
A.0.80,1.10B.1.10,0.80C.0.50,1.50D.1.50,0.50
A.200mmB.250mmC.300mmD.350mm
A.1.8mB.2.0mC.2.1mD.3m
A.1.1mB.1.2mC.1.4mD.1.5m
A.250mm,500mmB.200mm,350mmC.150mm,400mmD.100mm,500mm
A.0.2m2B.0.3m2C.0.5m2D.0.6m2
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