医嘱0.9%氯化钠溶液500mlivgtt,患者从上午8点20分开始输液,输液器点滴系数为20,护士根据情况把输液速度调整至40滴/分,预计输液完成的时间为
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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