A.0.5×109/L B.1×109/L C.5×109/L D.10×109/L E.20×109/L
A.5%~10% B.10%~15% C.10%~20% D.15%~25% E.20%~30%
A.精索靜脈曲張 B.先天性或后天性睪丸疾病 C.輸精管、精囊缺陷 D.有害金屬、放射性物質(zhì)及某些藥物損害 E.50歲以上男性