(A)5mg/L (B)0.6mg/L (C)0.01mg/L (D)0.007mg/L
(A)0mg/L (B)0.002mg/L (C)0.01mg/L (D)1mg/L
(A)蒸汽壓力 (B)蒸汽容積 (C)蒸汽溫度 (D)蒸汽密度