不符合早期食管癌的描述是() ["A.癌的直径小于2.0cm","B.浸润深度不超过粘膜下层","C.钡餐检查可有轻度局限性僵硬","D.无明显临床症状","E.无淋巴结转移"]
试述医用紫外线三个波段的主要生物学作用。
全肝照射放射损伤的TD5/5剂量是() ["A.15Gy","B.20Gy","C.25Gy","D.30Gv","E.35Gv"]
以非结合胆红素增高为主的黄疸病因主要有哪几种?
条形野照射肝放射损伤的TD5/5剂量是() ["A.5Gy","B.10Gy","C.15Gy","D.20Gy","E.25Gy"]
何为系统?