第3题: [单项选择]慢性肺源性心脏病的症状加重主要由于 A. 呼吸道感染 B. 过度劳累 C. 摄入钠盐过多 D. 心律失常 E. 停用洋地黄类制剂 参考答案:A 答案解析:[解析] 肺心病的诱因 [解析] 心力衰竭多发生在急性呼吸道感染后，因此常合并有呼吸衰竭，患者出现气喘、心悸、少尿、发绀加重，上腹胀痛、食欲缺乏、恶心甚至呕吐等右心衰竭症状。体检示颈静脉怒张
第17题: [单项选择]{{B}}Passage One
Questions 26 to 28 are based on the passage you have just heard.{{/B}} A. Childhood in his native home, Texas. B. Working as congressional secretary in Washington. C. Vacationing at his ranch in Texas. D. Presidency in the White House. 参考答案:C 答案解析:[听力原文]26-28
Lyndon B. Johnson was the 8th Vice-president of the United States to take the place
