第5题: [单项选择]男性,60岁,有慢性支气管炎、阻塞性肺气肿病史10余年,近3年来反复双下肢水肿,此次病情加剧,唇发绀、神志恍惚,双下肺闻及干、湿啰音,心率120/min,有期前收缩。B超检查对诊断慢性肺源性心脏病最有意义的征象是() A. 左右心室内径比>2 B. 右心室内径≥20mm C. 右心室流出道内径>20mm D. 右心室流出道内径>25mm E. 右心室内径>15mm 参考答案:B
第28题: [单项选择]Passage One Questions 26 to 29 are bused on the passage you have just heard.A. The bacteria from foreign places. B. Your hands’ own resident bacteria. C. Harmless skin residents on your hands. D. All the bacteria on your hands. 参考答案:A 答案解析:[解析] 26-29 Most people believe that regular hand-washing is the best way to prevent infection