龙骨表面进行防锈,其双面镀锌量中优等品镀锌量为()、一等品镀锌量为()、合格品的镀锌量为()
A.120g/cm3,100g/cm3,80g/cm3 B.140g/cm3,120g/cm3,80g/cm3 C.140g/cm3,120g/cm3,100g/cm3 D.120g/cm3,110g/cm3,110g/cm3正确答案A
龙骨表面进行防锈,其双面镀锌量中优等品镀锌量为()、一等品镀锌量为()、合格品的镀锌量为()
A.120g/cm3,100g/cm3,80g/cm3 B.140g/cm3,120g/cm3,80g/cm3 C.140g/cm3,120g/cm3,100g/cm3 D.120g/cm3,110g/cm3,110g/cm3正确答案A