题目内容

患者男，64岁，因“反复咳嗽、咳痰18年，活动后气促7年，间断下肢水肿1年，加重伴心悸、喘息2周”来诊。吸烟史30年。查体：口唇发绀，颈静脉怒张；桶状胸，双肺呼吸音低，散在干性啰音，双下肺可闻及湿性啰音；肝肋下2cm。提示右心功能不全的体征为（）。

A. 叩诊心界缩小
B. 双肺散在干、湿性啰音
C. 剑突下心音强于心尖部
D. 心房颤动
E. 颈静脉怒张
F. 水冲脉

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When troubleshooting a network， the output of the command show interfaces indicates a large number of runts. What is a runt？（）

A. the number of packets that are discarded because they exceed the maximum packet size of the medium
B. errors created when the CRC generated by the originating LAN station or far-end device does not match the checksum calculated from the data received.
C. the number of packets that are discarded because they are smaller than the minimum packet size of the medium
D. the number of received packets that were ignored by the interface because the interface hardware ran low on internal buffers
E. the number of times that the interface requested another interface within the router to slow dow

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