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[问答题,简答题] 简述正常心电图

再生障碍性贫血的诊断主要依据是() ["全血细胞减少","网织红细胞减少","骨髓检查","一般抗贫血治疗无效","无肝脾、淋巴结肿大"] 洋地黄中毒引起的室早二联律,首选的治疗是() ["苯妥英钠","阿托品","普萘洛尔","人工心脏起搏器","氯化钾"] 下述哪项用于治疗再生障碍性贫血() ["糖皮质激素","切脾术","雄激素","右旋糖酐铁注射","输血"] 急性肺水肿在什么情况下禁用吗啡() ["频发室性期前收缩","心肌梗死","肺功能不全","快速房颤","高血压"] 再障最主要的诊断依据是() ["网织红细胞减少","全血细胞减少,有出血或感染表现","骨髓增生不良","肝、脾、淋巴结不肿大","铁剂、叶酸治疗无效"] 简述正常心电图
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