与RIA比较,IRMA的特点不包括(). ["IRMA的反应速度更快","非竞争结合,使IRMA更易检测微少含量的抗原","抗体用量大但K值要求不高","反应参数与待测抗原含量成反比","具有更高的灵敏度"]
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"]
简易呼吸器辅助呼吸时,每挤压气囊一次,进入肺的空气量为()。 ["200~400ml","300~400ml","400~600ml","500~1000ml","800~1200ml"]
肝脏形态饱满,边缘变钝,肝脏近腹壁的前1/3区域回声增强,呈密集的细小点状,深部回声减弱,最可能的诊断是()。 ["淤血肝","脂肪肝","急性肝炎","慢性肝炎","急性肝坏死"]
胰腺癌的概述。