不属于异位妊娠常见病因的是 ["A.输卵管炎症","B.输卵管手术","C.输卵管发育不良","D.子宫肌瘤"]
异位妊娠最常见的部位是 ["A.输卵管伞部","B.输卵管壶腹部","C.输卵管峡部","D.输卵管间质部"]
用火焰原子吸收法测定水中总铬时,水样应采取怎样的保存措施?
宫颈癌的确诊方法是 ["A.血CEA","B.宫颈刮片","C.宫颈活组织病理检查","D.阴道镜"]
最易引起子宫肌瘤出血的类型是 ["A.肌壁间肌瘤","B.浆膜下肌瘤","C.黏膜下肌瘤","D.包膜外肌瘤"]
用原子吸收法测定空气中铅,采用稀硝酸浸出法制备样品溶液时,关键因素是什么?