【单选题】【消耗次数：1】
在Excel中，一个工作簿就是一个Excel文件，其扩展名为( )。
①
.EXE
②
.DBF
③
.XLS
④
.LBL
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snatch
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rob
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In the month, the man earned as much as, if______ than $50,000.
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no more
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would have
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keep company with
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