下列疾患，不能由腹部平片诊断的是() ["A．胆囊阳性结石","B．肠梗阻","C．慢性胰腺炎","D．消化道穿孔","E．小儿先天性肛门闭锁"]
神经根型颈椎病，首选的摄片体位是() ["A．颈椎双斜位","B．颈椎开口位","C．颈椎过伸位","D．颈椎过屈位","E．以上都不是"]
直人法硬膜外穿刺要通过3个韧带，即________、________、________，方达到硬膜外腔。
椎弓峡部断裂，正确的摄片体位是() ["A．腰椎正位","B．腰椎侧位","C．腰椎双斜位","D．腰骶部斜位","E．腰骶部侧位"]
从颈椎开口位照片中，判断摄片体位正确的依据是() ["A．上门齿与枕骨边缘投影重叠","B．上门齿与枕骨边缘稍分离","C．上门齿投影在枕骨边缘的下方","D．上门齿投影在枕骨边缘的上方","E．上门齿与枕骨边缘分离约0.5cm"]
嵌顿的疝内容物为部分肠壁的疝称为_________疝。
