【单选题】【消耗次数：1】
以下检索式中，哪个能检索出“儿童”和“佝偻病”在同一字段中的文献（）
①
儿童 or 佝偻病
②
儿童 with 佝偻病
③
儿童 and佝偻病
④
儿童 not佝偻病
参考答案：
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相关题目
【单选题】
佝偻病的发生是由于缺乏（ ）．
①
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②
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③
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④
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随机题目
【多选题】
根据《水利水电工程标准施工招标文件》(2009年版)，水利工程评标办法包括（）
①
A.经评审的最低投标价法
②
B.最低价法
③
C.合理低价法
④
D.平均价法
⑤
E.综合评估法
【多选题】
水利工程项目后评价按组织实施的层次可分为（）
①
A.施工单位的自我评价
②
B.项目法人的自我评价
③
C.项目行业的评价
④
D.主管部门的评价
⑤
E.运行管理单位的评价