单项选择题
A.ETEC B.EAggEC C.EPEC D.EHEC E.EIEC
A.1% B.3% C.5% D.10% E.30%
A.5~10g/L碳酸氢钠 B.10~20g/L碳酸氢钠 C.10~15g/L碳酸氢钠 D.15~20g/L碳酸氢钠 E.20~30g/L碳酸氢钠