【单选题】【消耗次数：1】
做清洁中段尿细菌培养，正确的是
①
宜取在膀胱内贮留6～8h的尿液
②
宜在停用抗菌药物48h后收集尿液
③
留取尿液前用消毒剂清洗阴部
④
尿液留置于清洁容器内
⑤
尿标本如不能及时送检，应加适量防腐剂
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