下列不能列为甲状腺大部切除术适应证的是() ["继发性甲亢或高功能腺瘤","中度以上的原发性甲亢","青少年甲亢患者","有压迫症状或胸骨后甲状腺肿伴甲亢","抗甲状腺药物或碘治疗后复发者"]
哪一项不能作为确定胎位的标志() ["小囟门","大囟门","矢状缝","冠状缝","胎儿双耳"]
病人仰卧,影像增强器转至病人左前方的摄影方向称() ["头足位","足头位","复合位","左前斜位","右前斜位"]
活跃期平均约需() ["2小时","4小时","6小时","8小时","10小时"]
X线透过被照体后形成的X线强度的差异,称为() ["人工对比度","天然对比度","X线射线对比度","胶片对比度","照片对比度"]
什么是连铸比?