第1题: [单项选择]主动脉左心室隧道彩色多普勒观察时，舒张期见异常血流束起源于（）。 A. 主动脉瓣口 B. 主动脉窦根部 C. 主动脉瓣环部 D. 左心室上部 E. 主动脉瓣体 参考答案:A 答案解析:主动脉瓣下狭窄可分为隔膜型与隧道型。隧道型常为隔膜型狭窄合并环形肌肥厚，形成左心室流出道隧道状狭窄。舒张期为自主动脉瓣口反流的血流。
第12题: [单项选择]Questions 23 to 25 are based on the conversation you have just heard. A. There are more to be expected. B. He has been changing their residency. C. He is very satisfied with the life there. D. The life in Chicago is much better. 参考答案:C 答案解析:[听力原文] How does the man like living now on this street
第24题: [单项选择]She often begged her husband not to go out at night, but her words were of little ______. A. function B. influence C. avail D. restriction 参考答案:C 答案解析:[解析] 逻辑关系题：转折。题干前面说她经常乞求丈夫晚上不要外出，后面的but语气转折，提示她的话没用。[A]function“功能，作用”，强调实际的功能和属性。[B]influence“影响”，强
