能激活补体经典途径的免疫球蛋白是() ["IgM和IgE","IgG和IgA","IgG和IgM","IgG和IgD","IgM和IgD"]
患者,男性,62岁,突发呕血600ml,黑便4次,共约600g,并伴有意识模糊。既往有肝功能异常史30余年,高血压、类风湿关节炎病史8年,长期服用阿司匹林。查体:贫血貌,BP75/55mmHg,HR118次/分,肝肋下未及,脾肋下2cm,移动性浊音(+),血糖5.8mmol/L。引起患者意识不清最可能的原因为() ["A.肝性脑病","脑梗死","血容量不足","胃癌脑转移","低血糖昏迷"]
政府债券的特征有()。 ["安全性高","流通性强","收益稳定","低税待遇"]
空肠梗阻时,黏膜X线检查表现为() ["花瓣形改变","皱襞消失、中断","有龛影","星芒状改变",""鱼肋骨刺"状改变"]
在“仁人之言,其利溥哉”中,“溥”之义为() ["广大","普遍","博大","普通"]
多次中期妊娠流产史,且流产时不伴疼痛性宫缩早孕期阴道出血量少,用黄体酮治疗