第9题: [单项选择]进行心内直视手术时如出现心内暗红色血液回流异常增多应考虑() A. 先天性膈疝 B. 主动脉瓣反流 C. 室间隔缺损 D. 房间隔缺损 E. 永存左上腔静脉 参考答案:E 答案解析:心脏直视手术时,如果病人存在永存左上腔静脉而术前未发现,术中未予插管引流,则心脏内可出现从左上腔回流的静脉血,呈暗红色。而动脉导管和主动脉瓣反流的回血往往是氧合的鲜红色的血。肺动脉闭锁如体肺侧支形成会
第11题: [单项选择]A.Every American city has a nickname. B.Nicknames are positive for cities. C."The Big Apple" is the only nickname of New York. D.New York is famous for its production of nicknames. 参考答案:B 答案解析:[听力原文] Many American cities have nicknames. These can help establish an identity, spread p