关于恙虫病的传染源及传播媒介,正确的是() ["传染源是鼠类,传播媒介是恙螨","传染源是猪,传播媒介是恙螨","传染源是恙螨,传播媒介是鼠类","传染源是猪,传播媒介是鼠类","传染源是鼠类,传播媒介是蚊子"]
患者男,43岁。突发寒战高热,黄疸,右上腹剧痛,患者的诊断为() ["急性胰腺炎","肝脓肿","胆道蛔虫","胰头癌","急性化脓性胆管炎"]
某病人,女,24岁,因病切除子宫,病理检查见子宫肌壁内有水泡样组织,镜下可见增生的滋养细胞及绒毛结构,该病人最可能的诊断为() ["A.葡萄胎","B.侵蚀性葡萄胎","C.绒毛膜癌","D.子宫内膜异位症","E.子宫内膜炎"]
绒毛膜癌最主要的转移途径是() ["A.淋巴转移","B.直接侵犯","C.血行转移","D.腹腔种植","E.弥散性播散"]
能引起伤寒不断流行的传染源是() ["伤寒极期患者","潜伏期末的患者","恢复期带菌者","缓解期带菌者","慢性带菌者"]
什么是套期保值?