用什么方法确定扩展不确定度U?
肺性脑病与高血压脑病鉴别的主要依据是() ["头痛","气短","发绀","高血压","昏迷"]
慢性呼吸衰竭时,下列哪项不利于呼吸道通畅() ["雾化吸入祛痰剂","应用糖皮质激素","大量补液","应用快速利尿剂","帮助患者翻身拍背"]
Ⅱ型呼吸衰竭最主要的发生机制是() ["通气/血流<0.8","通气/血流>0.8","弥散功能障碍","肺动.静脉样的分流","肺泡通气不足"]
对呼吸性酸碱失衡的判断,最有价值的指标是() ["BE","PaCO2","pH","AB","SB"]
患者男性,40岁,因心跳骤停,请你做胸外心脏按压进行急救(在医学模拟人上操作)。