中枢兴奋药按其主要作用部位和效应分哪几类?
上呼吸道与呼吸道的解剖分界是() ["A.口咽部","B.喉咽部","C.主支气管","D.环状软骨","E.甲状软骨"]
八岁女孩,右上腹痛半月,伴发热、皮肤黄染3天,查体:皮肤巩膜黄染,心肺无异,腹软,无压痛,肝区有叩痛,肠鸣音正常。B超肝稍大,胆管内见平行强光带。最可能的诊断是() ["A.病毒性肝炎","B.胃炎","C.胆道蛔虫症","D.胰腺炎","E.肠痉挛"]
何谓半数致死量和半数有效量?
男孩,3岁。诊断为暴发型流行性脑脊髓膜炎(休克型)。导致死亡的主要原因() ["A.脑水肿","B.中枢性呼吸衰竭","C.消化道出血","D.气道内痰液阻塞","E.循环衰竭"]
何谓习惯性、成瘾性?