题型:问答题 简答题 John and I _____ friends for eight years. We first got to know each other at a Christmas party. But we _____ each other a couple of times before that.A.had been; have seen B.have been; have seen C.had been; had seen D.have been; had seen 查看答案
题型:问答题 简答题 下列哪项不是针对心力衰竭的病因的治疗().A.控制高血压B.药物、介入治疗改善冠心病心肌缺血C.慢性心脏瓣膜病换瓣手术D.使用β受体阻滞剂阻止心室重塑E.冠状动脉搭桥术治疗冠心病 查看答案