A. He has decided to retreat from the talks. B. He has supported the talks. C. He has showed doubts about the talks. D. He has opposed the talks. 参考答案:B 答案解析:[听力原文]29-30 Iran's new chief nuclear negotiator has given his backing to talks to resolve its
第39题: [单项选择]男性,68岁。于夜间睡眠时突发呼吸困难,呈进行性加重,伴咳嗽,口唇发绀。既往有高血压病史20年,血压控制不佳。该患者呼吸困难的原因是() A. 支气管哮喘 B. 肺栓塞 C. 左心衰竭 D. 右心衰竭 E. 慢性支气管炎急性发作 参考答案:C 答案解析:急性左心衰的临床诊断有急性左室后负荷增高(如高血压危象、急进型恶性高血压、严重主动脉瓣狭窄等),有急性肺水肿表现,如突然胸闷、气急、端坐呼吸、面色苍白、口唇发绀、阵咳、咯出大量粉红色泡沫痰,严重时咯血