单项选择题
A.1.2~1.3% B.1.15~1.2% C.1.1~1.15% D.2.5~3%
A.0.75 B.1.0 C.1.25 D.1.5
A.仅在宝钢的焦炉 B.不在宝钢的焦炉 C.在任何焦炉都