局限性脂肪肝的典型超声表现是（）。 ["单发或多发边界清楚的强回声结节","无占位效应的片状细密强光点回声，内有正常走行的血管","占位效应明显的低回声","周边血管绕行的强回声结节","外周有晕圈的低回声结节"]
只能在方形弓丝上完成的弯曲叫第三序列弯曲，临床上通常称（） ["转矩辅弓","排齐辅弓","内收弯","垂直曲","转矩"]
目前，诊断肺动脉瓣狭窄首选的无创影像技术是（） ["X线平片","CT","PET","MRI","超声心动图"]
迄今，诊断动脉导管未闭的"金标准"是（） ["X线平片","CT","MRI","超声心动图","心血管造影"]
上消化道出血，伴有发热及右上腹痛，应考虑（） ["胃、十二指肠溃疡病","门静脉高压症","出血性胃炎","胃癌","胆道出血"]
胰腺癌的病理。
