【单选题】静脉注射过程中,发现患者局部出现肿胀、疼痛,试抽见回血,可能的原因是( )。
【简答题】I don’t know what illness he suffered from, but I do remember he mentioned ________ in hospital last year. [A] to have been [B] to be [C] having been [D] being
【单选题】静脉注射过程中,如发现患者局部疼痛、肿胀,试抽有回血,可能的原因是
【单选题】萃取操作中, 在溶解曲线以下的两相区,随温度的升高,溶解度曲线范围会( ),萃取效果( )。