服用洋地黄治疗的患者出现下列哪项表现应考虑有洋地黄中毒的可能（） ["心电图ST-T呈鱼钩形改变","心电图Q-T间期缩短","心电图出现高U波","频发房性期前收缩","频发室性期前收缩"]
碳酸锂的作用机制为（） ["阻断中枢5-HT受体","阻断N胆碱受体","阻断β、β1受体","使突触间隙的Na
+<\/sup>浓度下降","对心肌有奎尼丁样作用"]
往复式发动机
原发性高血压和肾性高血压的区别主要在于（） ["尿常规","肾功能","心脏大小","高血压的程度","有无明显贫血"]
丙米嗪的作用特点为（） ["阻断中枢5-HT受体","阻断N胆碱受体","阻断β、β1受体","使突触间隙的Na+<\/sup>浓度下降","对心肌有奎尼丁样作用"]
压缩比
