早产儿，生后 2 天，胎龄 34 周。因发绀给予氧气吸入，为预防其氧中毒，正确的做法是
A、维持动脉血氧分压在80～90mmHgB
暂无解析
Henoticedthehelicopterhoveringoverthefield.Thentohisastonishment,hesawaropeladder_____outandthreemenclimbingdownit.
Wecanhear____fromthebackoftheroom.
Marytiptoedoverandtooktheclockawaybecauseshehatedtohearit（）whenshewastryingtogotosleep.
Aleading___________intelligenceandoperationscompanyhasreleaseditsanalysisofworldwidereportedincidentsofpiracyandcrimeagainstmariners.
AlthoughSPanish，heattendedthecourse.
