第26题: [单项选择]{{B}} Questions 11 to 18 are based on the conversation you have just heard.{{/B}} A. They are very friendly. B. They are some nice people. C. They are very quiet. D. They are not sociable. 参考答案:D 答案解析:[听力原文]
W: I’m amazed that you still haven’t gotten to know your neighbors.
M: They tend to keep t
第29题: [单项选择]患者女性,55岁,曾有风湿关节疼痛病史,近期出现气短、呼吸困难、乏力、心悸等症状,听诊于心尖区可闻及舒张期杂音,X线检查示心影扩大,呈梨形,二维超声心动图检查见二尖瓣前后叶增厚、钙化,交界处有粘连,瓣膜变形,活动受限,瓣口变小二尖瓣狭窄最先扩大的心腔为()。 A. 左心室和左心房 B. 右心房和左心室 C. 左心室和右心室 D. 左心房和左心室 E. 左心房和右心室 参考答案:E