下列哪项不引起血清PRL升高() ["肾衰竭","下丘脑疾病","原发性甲状腺功能减退症","应激、睡眠、吮吸","原发性醛固酮增多症"]
关于妊娠期合并急性乙型肝炎患者的特点,错误的是() ["无黄疸型肝炎比例高","消化道症状较明显","产后大出血较常见","妊娠后期患乙型肝炎者易传播给胎儿","可对胎儿有影响"]
下列何种物质引起荨麻疹的机制为非变态反应性() ["细菌","血清制剂","真菌","蛇毒","以上都是"]
在过敏性紫癜密切相关的细菌感染中,哪种细菌为主() ["大肠杆菌","金黄色葡萄球菌","β溶血性链球菌","肺炎球菌","流感嗜血杆菌"]
Colles骨折最有诊断意义的体征是() ["局部肿胀并有骨擦感","典型畸形","局部压痛","反常活动","手功能受限"]
试述莫氏Ⅰ型房室传导阻滞的心电图特点。