【多选题】【消耗次数：1】
PubMed检索结果输出方式包括以下哪项（）？
①
File
②
Clipboard
③
Collections
④
E-mail
⑤
My Bibliography
参考答案：
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在PubMed数据库中不能对检索结果按以下哪项进行排序（）？
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