题型:问答题 简答题 QRS波增宽,频率190次/分,律稍不规则,P波频率70次/分,其诊断是()。A.阵发性房性心动过速B.阵发性交界性心动过速C.阵发性室性心动过速D.心房扑动E.心房颤动 查看答案
题型:问答题 简答题 I tried to call you ______ I heard from him, but you were not in. [ ]A. since B. whileC. until D. as soon as 查看答案