A.30%~50% B.50%~70% C.70%~90% D.90%以上
A.5%~15% B.15%~25% C.25%~3s% D.35%~45%
A.B細(xì)胞功能受損 B.抑制性T細(xì)胞功能受損 C.輔助性T細(xì)胞功能受損 D.紫外線誘發(fā)DNA抗原改變