关于去甲肾上腺素哪项错误的是() ["仅4%~16%以原形代谢","交感神经释放递质","部分被单胺氧化酶和儿茶酚甲基移位酶代谢","其贮存量有限,易引起耗竭","神经冲动能导致其释放"]
空压机气源压力不稳定的原因?
MR对下列哪一项检查不如超声心动图和放射性核素显像() ["心肌病","心脏肿瘤","心肌缺血","主动脉瘤","先天性心脏病"]
患者,男性,18岁,近两周出现持续性低热,头痛不适,四肢酸痛,食欲不振,3天前,出现腹部胀痛,腹泻,大便呈暗红色,入院前6小时突然出现右下腹剧痛,迅速弥漫至全腹。查体:一般状态差,呈恶液质状态,腹胀,全腹压痛,尤以右下腹明显肠鸣音消失,白细胞16×109/L,X线腹部透视见膈下游离气体,诊断应考虑为() ["十二指肠溃疡穿孔","肠伤寒穿孔","急性阑尾炎穿孔","美克耳憩室炎穿孔","以上都不是"]
用生长素处理二倍体番茄所得的无籽番茄的基因型可能是() ["YR","Dd","Ab","BC"]
清创术禁忌证。