尿道下裂的分型中,尿道口位于阴茎根部与阴囊交界处时属于() ["阴茎头型","阴茎型","阴茎阴囊型","阴囊型","会阴型"]
根据标准预防的概念,下列不被看作具有传染性的物质是() ["粪便和尿液","体液","分泌物","血液","汗液"]
囊腺瘤最常见于()。 ["乳腺","大肠","甲状腺","卵巢","肾上腺"]
可致慢性肝炎或肝硬化的病毒为() ["HAV,HBV和HCV","HBV,HCV和HDV","HCV,HDV和HEV","HDV,HEV和HAV","HEV,HAV和HBV"]
足月妊娠,胎头未入盆,如试产,应观察几小时为宜() ["1~2小时","8~10小时","10~12小时","4~6小时","16~18小时"]
38岁男性患者,钡餐示食管壁张力降低,蠕动减弱,钡剂排空延迟,并在食管下段见到串珠状充盈缺损影,应首选考虑()患者,女性,33岁。因进食困难进行性加重一年就诊,钡餐示食管明显扩张,蠕动减弱,食管远端残根状,表面尚光整,服温水后造影剂可部分进入胃内,最可能的诊断为()