单项选择题
A.Moldavan B.Poole C.Lagererantz D.Coulter E.Westergard
A.枸橼酸钠 B.EDTA-K2 C.肝素 D.草酸盐 E.双草抗凝剂
A.10%～30% B.20%～30% C.30%～40% D.50%～70% E.70%～80%