在甲型H1N1流感疫点中对手与皮肤的消毒,用( )碘伏溶液或0.5%氯己定醇溶液涂擦,作用时间1分钟~3分钟。
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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