单项选择题
A.0.1MPaB.0.2MPaC.0.3MPaD.0.5MPa
A.10%,10%B.10%,15%C.15%,10%D.15%,15%
A.15kg/m3B.20kg/m3C.25kg/m3D.30kg/m3
A.125gB.175gC.225gD.250g
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