单项选择题
A.0.9%NaC180ml，5%NaHCO40ml B.0.9%NaC180ml，l.8%NaHCO40ml C.0.9%NaC180ml，10%CS40ml D.0.9%NaC140ml，5%NaHCO80ml E.0.9%NaC180ml，l.4%NaHCO40ml
A.1/2张 B.1/3张 C.2/3张 D.1/4张 E.等张