单项选择题
A.2%~3% B.6%~9% C.10%~15% D.16%~20% E.21%~25%
A.ABO B.HLA-Ⅰ类 C.HLA-Ⅱ类 D.Rh E.HPA
A.CD3+ B.CD4+ C.CD8+ D.CD19+ E.CD20+
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