对周期性下腹痛半年余，无月经来潮的青春期女性，首选的检查是（） ["妇科超声","双合诊检查","外阴部视诊","内分泌检查","肛诊检查"]
肾静态显像不能用于检测（） ["肾小球滤过率","肾实质内占位性病变","肾脏位置","肾脏大小","肾脏形态"]
肺癌易形成空洞的是（） ["腺癌","鳞癌","未分化癌","肺泡细胞癌","转移性肺癌"]
大叶性肺炎实变期见于（） ["发病后1～6小时","发病后6～12小时","发病后即刻","发病2～3天后","发病后7～10天"]
目前肾静态显像不能用于直接显示（） ["先天性肾畸形","先天性肾缺如","肾萎缩","肾结石","肾脏位置异常"]
什么是软磁材料？软磁材料的基本要求是什么？
