【单选题】【消耗次数：1】
两次采集间隔期间不少于（ ）
①
1个月
②
2个月
③
3个月
④
6个月
⑤
1年
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水利工程完成标准化管理创建后，应试运行后再进行验收。其中管理手册试行不少于1个月，开始时间由水管单位发文明确；运行管理平台试行不少于3个月，开始时间从产生运行管理台帐起计算。
①
正确
②
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