Tc的半衰期是() ["A．6.02小时","B．6.02天","C．1.658小时","D．50.55天","E．3.05天"]
简述眼内异物的诊断要点。
间歇性肠道出血，核素显像应选择哪种显像剂() ["A．Tc-DTPA","B．Tc-红细胞","C．Tc-MAA","D．Tc-ECD","E．Tc-胶体"]
眼球穿通伤可发生哪些并发症?
带电粒子在某一长度径迹上消耗的能量与该径迹在光电效应中，γ光子() ["A．通过多次散射失去能量","B．失去的能量等于光子能量减去结合能","C．失去一半能量","D．失去全部能量","E．损失的能量与物质密度有关长度之比是()"]
试述眼球外异物的种类及处理方法。
