第15题: [单项选择]According to the news, how many pilot whales eventually died before they were rescued A. 15. B. 7. C. 8. D. 6. 参考答案:C 答案解析:[听力原文]21-22
More than 50 pilot whales beached themselves on a stretch of Cape Cod sand Monday an
第24题: [单项选择]慢性风湿性心脏病病人易发生晕厥或猝死的病变基础是() A. 主动脉瓣关闭不全 B. 肺动脉瓣关闭不全 C. 主动脉瓣狭窄 D. 三尖瓣关闭不全 E. 肺动脉瓣狭窄 参考答案:C 答案解析:主动脉瓣钙化侵及传导系统致房室传导阻滞可致晕厥;主动脉瓣狭窄致左心室肥厚、心内膜下心肌缺血或冠状动脉栓塞致心律失常可致猝死。