患者女，13岁，前牙后侧牙间乳头呈球状突起，松软光亮，局部刺激物不明显，探诊未及附着丧失最可能的诊断为（）. ["A.青少年牙周炎","妊娠期龈炎","药物性牙龈增生","青春期龈炎","牙间乳头炎"]
胰岛B细胞可分泌（） ["胰高血糖素","血管升压素","降钙素","胰岛素","生长抑素"]
变压器铁心必须一点接地的原因主要是防止铁心或其他金属构件两点或以上接地时，在接地间形成闭合回路，造成（）。 ["环流","击穿","闪络","放电"]
苯妥英钠治疗洋地黄中毒所致室上性心动过速，急用时可静脉推注（） ["100mg/5～10min","50mg/5～10min","150mg/5～10min","200mg/5～10min","250mg/5～10min"]
抗张力能力最强、防止脊柱过度后伸的结构是（） ["椎体","椎间盘","椎间小关节","前纵韧带","后纵韧带"]
呕血概述
