A.(1200-(7000*60/100*1000*10/100*4.2/3600)*0.44)/(7000*60/100*(100-10)/100/500)
B.1200/(7000*1000*60/100*4.2/3600)
C.1200/(7000*60/100*4.2/3600)
D.1200-(7000*60/100*1000*10/100*4.2/3600)*0.44/(7000*60/100*(100-10)/100/500)
A.紡絲消耗量
B.循環(huán)量
C.硫酸鈉含量
D.硫酸含量