案例：患者，男性，70岁。既往慢性咳嗽、咳痰30余年，活动后胸闷气促10余年。1周前因感冒后病情加重入院。血气分析（呼吸空气时)示：pH7.28，PaO250mmHg，PaCO265mmHg。该患者应给予的吸氧浓度为

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='30151' and id < 2439715 and id<>'2439715' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30151' and id > 2439715 and id<>'2439715' order by id asc limit 5