第24题: [单项选择]An inflatable life raft is hand-launched by(). A. pulling a cord B. cutting the wire restraining bands C. removing the rudder packing strip D. throwing the entire container overboard 参考答案:D
第25题: [单项选择]以下哪项是主动脉瓣关闭不全所致() A. SAM现象 B. 弓背样改变 C. 钻石样改变 D. 吊床样改变 E. 二尖瓣前叶高频震颤 参考答案:E