肛裂在祖国医学中称为:() ["鸡冠痔","牡痔","牝痔","血痔","钩肠痔"]
牡痔的现代病名是:() ["内痔","外痔","混合痔","肛瘘","肛裂"]
产生铁磁谐振过电压的原因是什么?
在农田、湿地、森林、和草原四大生态系统中,()生态系统处于主动地位。 ["A、农田","B、湿地","C、森林","D、草原"]
某男,两周前尿道疼痛,自服阿莫西林胶囊治疗1周,疼痛略有好转,现患者尿道有白色分泌物,时有疼痛。经询问患者承认发病前有冶游史。最可能的疾病是:() ["A.非淋菌性尿道炎","淋病","软下疳","尖锐湿疣","生殖器疱疹"]
防雷保护装置出现哪些问题应停止运行?