克罗恩病与肠易激综合征的共同症状为() ["A.腹痛","B.肠梗阻","C.胃肠胀气","D.便秘","E.腹泻"]
大肠肛门大出血时,行剖腹探查术,术中采取相应手术处理方式有() ["A.激光止血","B.止血夹止血","C.病变肠段切除吻合术","D.肠造口","E.血管结扎术"]
怎样根据声音来判断变压器的运行情况?
何谓正火?正火的目的?正火和退火有何异同?
骶尾部畸胎瘤症状与体征与哪些因素有密切关系?() ["A.年龄","B.肿瘤大小","C.肿瘤类型","D.有无恶变","E.是否继发感染"]
何谓淬火?常用的淬火方法的哪些:何谓淬透性?何谓淬硬性?