目的 :研究不同生长期个体意外遭受辐射损伤对随后接触致瘤物长期敏感性的影响。方法 :1用 γ射线照射受孕 4d(胚胎期 )或 15 d(胎儿期 )的 C5 7BL6小鼠 ,生产的仔鼠供实验用 ;用 γ射线照射 4日龄 (新生儿期 )或 2 1日龄 (幼年期 )的 BDF1小鼠。上述四期小鼠照射剂量均为 1.0 OBJECTIVE: To study the long-term susceptibility of subsequent exposure to tumor caused by radiation injury in individuals with different growth stages. Methods: 1 Gamma irradiation was used to give experimental mice with C5 7BL6 mice who were pregnant at 4 days (embryonic stage) or 15 days (fetal stage); 4 days old (neonatal period) or 21 days (Juvenile) BDF1 mice. The above four doses of mice were 1.0