正常成人的QRS波群时限多为（） ["0.04～0.08s","0.04～0.10s","0.06～0.10s","0.08～0.10s","0.08～0.12s"]
对于慢性肺源性心脏病心律失常的治疗不正确的是（） ["偶发房性期前收缩，以纠正缺氧为主","窦性心动过速不宜用β受体阻滞剂","频发室性期前收缩选用利多卡因","室性心动过速可用利多卡因","频发房性期前收缩选用常规剂量洋地黄"]
麻疹黏膜斑
正常成人心率在正常范围时，P-R间期为（） ["0.08～0.11s","0.08～0.20s","0.12～0.16s","0.12～0.20s","0.16～0.24s"]
满月面容
蜘蛛痣
