简述地方性克汀病的发病机制。
排卵时随卵细胞一同排出的有() ["放射冠","透明带","小部分卵丘的颗粒细胞","卵泡内膜细胞","卵泡外膜细胞"]
关于腕关节的活动范围,下列错误的是() ["背伸70°","掌屈80°","桡侧偏25°","尺侧偏50°","中立位0°"]
患者男性,47岁,无症状。心电图如图5-20所示,应诊断为()。 ["右心室肥厚","预激综合征","完全性右束支阻滞","完全性左束支阻滞","后壁心肌梗死"]
弥漫性泛细支气管炎(DPB)早期的胸片表现最常见的是() ["A.肺气肿","B.弥漫的网状结节状影","C.双下肺毛玻璃状影","D.双下肺弥漫的小结节影","E.双肺多发囊状支气管扩张"]
什么叫地方性克汀病?