21岁,女性,停经50天,行负压吸宫术,术中压力应控制在()。 ["100~200mmHg","200~300mmHg","300~400mmHg","400~500mmHg","500~600mmHg"]
心包积液,下列不是其典型X线表现的是() ["A.心影普遍性向两侧扩大,呈烧瓶样或球状
","B.上腔静脉影增宽
","C.心影在短期内迅速增大合并肺淤血
","D.心脏搏动明显减弱而主动脉搏动正常
E.主动脉影变短"]
患者男,70岁,重度肺气肿,胃大部切除术后胸片示双肺肺炎,pH7.32,可诊断为() ["代谢性酸中毒","呼吸性酸中毒","代谢性碱中毒","呼吸性碱中毒","高钾血症"]
患者男,49岁,胆总管囊肿,胆管空肠吻合术后胆瘘,pH7.29,可诊断为() ["代谢性酸中毒","呼吸性酸中毒","代谢性碱中毒","呼吸性碱中毒","高钾血症"]
配制破伤风抗毒素皮试液的标准为每0.1ml含破伤风抗毒素() ["5U","15U","50U","200U","500U"]
简述20世纪90年代之后,发展中国家对其经济体制与发展战略主要进行了哪些调整?