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
