【单选题】【消耗次数：1】
采集样本后如何做手部消毒？
①
消毒剂消毒手部即可
②
消毒剂消毒后，脱去外层手套，消毒内层手套，再戴上外层手套
③
消毒剂消毒后，脱去外层手套，消毒内层手套，戴新的外层手套
④
消毒剂消毒手部，脱去手套再换一副新手套
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