单项选择题

配置2:1等张含钠液120ml需()

A.0.9%NaCl 80ml,5%NaHC03  40ml
B.0.9%NaCl 80ml,1.8%NaHC03 40ml
C.0.9%NaCl 80ml,10%GS  40ml
D.0.9%NaCl 40ml,5%NaHC03 80ml
E.0.9%NaCl 80ral,1.4%NaHCO3 40ml