第4题: [单项选择]下述关于闭合性气胸采用排气疗法的叙述,正确的是() A. 每次抽气不宜超过1.5L B. 积气量多者可每日抽气一次 C. 胸腔闭式引流应为首选排气方式 D. 肺复张能力差者,应尽快将气抽尽 E. 积气量达到该侧胸腔容积的15%即可抽气 参考答案:B 答案解析:闭合性气胸患者采用排气疗法的原则是:如气胸患者的肺被压缩小于20%,则可采用保守治疗,无须抽气。如积气量大,症状明显者可每日抽气1~2次,但每次抽气量不宜超过1000ml(1L)。如患者肺复张能力较差
A. How much it has improved in recent years. B. How reliable long-range forecasts are. C. How long it takes to become a meteorologist. D. How the current forecast will affect the speakers. 参考答案:B 答案解析:[听力原文]4-7 W: We' d better be looking for sales on down jackets and thermo underwear. It’s going t