铁磁性颗粒造影剂对质子弛豫时间的影响为() ["A．T1缩短，T2缩短 ","B．T1缩短，T2延长 ","C．T1不变，T2缩短 ","D．T2不变，T2延长 ","E．T1延长，T2缩短"]
胰腺癌姑息性治疗主要要解决哪些问题() ["A．解除黄疸","B．解除胃排空障碍","C．解除肠梗阻","D．止痛","E．放疗或化疗促使肿瘤缩小"]
胃癌化疗较有效药物有哪些() ["A．5-FU","B．CDDP","C．CBP","D．TPT","E．MMC"]
诊断水盐代谢和酸碱平衡失调必须明确____、____、____、____和____。
CT平扫极高密度，T1、T2加权极低信号时，一般提示为以下哪种病变() ["A．脂肪","B．钙化 ","C．脑脊液 ","D．肌腱 ","E．脑白质"]
外科常见的休克有____及____。
