A.脊髓 B.小腸 C.肺 D.腦干 E.食道
A.小于2mm B.小于3mm C.小于4mm D.小于5mm E.小于6mm
A.細(xì)胞更新快 B.損傷表現(xiàn)早 C.α/β比值高 D.對(duì)總治療時(shí)間變化不敏感 E.對(duì)分次劑量變化不敏感