类风湿关节炎是一种() ["中老年退行性变,非炎症疾病","与IgM半乳糖化缺陷有关","非对称性多关节为主的疾病","与A族乙型链球菌感染有关的疾病","以多关节炎为主的自身免疫性疾病"]
猩红热首选治疗方法是() ["复方新诺明3~5天","利福平3~5天","庆大霉素5~7天","头孢曲松7~10天","青霉素7~10天"]
对脊髓灰质炎病毒致病特点的错误描述是() ["传播方式主要是粪-口途径","可形成二次病毒血症","病毒的血凝素可吸附神经细胞","大多数人感染后表现为隐性感染","极个别病例可以发生延髓麻痹"]
流行病学实验研究的终点评估有正面与利弊两方面结局都应加以测量,负面评估应选择下列哪种指标() ["症状加重","治愈率低","发病率或死亡率","不良反应率","失访率"]
轮状病毒致婴幼儿秋冬季腹泻经() ["呼吸道、消化道和直接接触传播","粪-口途径传播","血液传播","性接触传播","垂直传播"]
呕血病史采集要点