全血有哪些主要缺点?
关于碘过敏反应的描述错误的是 ( ) ["A．检查室应备足抢救设备和药品","B．造影前用抗过敏药可减少碘过敏发生","C．碘过敏试验阴性则不会发生碘过敏反应","D．多见于血管内给予含碘造影剂","E．用同一批号含碘造影剂也要做碘过敏试验"]
垂体瘤的照射野较合理布野方法；() ["A．额前野","B．双颞侧野","C．额前野+头顶部","D．双颞侧野+额前野","E．双颞侧野+额前野+头顶部野"]
为什么说全血并不“全”?
不通过海绵窦的颅神经是() ["A．动眼神经","B．滑车神经","C．外展神经","D．三叉神经","E．视神经"]
为什么不提倡输全血，而提倡成分输血?
