第3题:[单选题]诊断主动脉瓣关闭不全最重要的体征是 A. 心界扩大呈靴形 B. 主动脉瓣区第二音减弱 C. 心前区抬举性搏动 D. 周围血管征 E. 主动脉瓣第二听诊区闻及舒张期杂音 参考答案:E
第4题: [单项选择]To reduce the number of strakes at the bow,two strakes are tapered and joined at their ends by a single plate. This plate is known as a(). A. cover plate B. joiner C. lap strake D. stealer plate 参考答案:D