在影响电离辐射照射量的因素中,哪个因素的作用最明显() ["活度","温度","时间","距离","屏蔽"]
β-衰变发生于() ["激发态原子核","贫中子原子核","质子数大于82的原子核","富中子原子核","超重原子核"]
内转换电子产生于以下哪一过程() ["电子俘获","光电效应","γ衰变","康普顿效应","湮灭辐射"]
“太阴病,脉浮者”,兼有发热恶寒、四肢疼痛、食少纳差,腹胀便溏,宜用() ["桂枝汤","理中丸","桂枝人参汤","四逆散","桂枝加芍药汤"]
简述肾上腺髓质显像的适应证。
简述骨转移灶呈现"冷区"的主要原因。