绦虫成虫有（） ["口和消化道","无口和消化道","有口无消化道","无口无消化道","有口无肛"]
予中毒患者洗胃时，每次注入液体的适宜量是：（） ["100-200ml","200-300ml","300-400ml","400-500ml","1000ml"]
超声测量双顶径影响准确性的因素有（）①选择测量平面不标准②胎头方位③胎头头型④羊水过少 ["①","①②","①②③","①②③④","①③④"]
前牙反骨骼Ⅰ型其诊断标准是（） ["ANB角＜0°","ANB角＜2°","ANB角＞5°","ANB角＜－5°","ANB角≥0°"]
鉴别室速与阵发性室上速最有力的证据是（） ["QRS波群宽大畸形的程度","是否存在房室分离","心室率的快慢","静脉应用普罗帕酮是否可终止","对迷走神经刺激的反应"]
汽蚀有什么现象？有哪些危害？
