单项选择题

溶出液成份为Al2O3307g/l、Na2OK260g/l、Na2OT275g/l,母液成份为Al2O3134.5g/l、Na2OK254g/l、Na2OT268.8g/l,循环效率()kg.氧化铝/m3.母液。

A.162.5
B.163
C.165.5
D.166.5