單項(xiàng)選擇題

使用限制檢索技術(shù)查找2000年以來(lái)的計(jì)算機(jī)方面的文獻(xiàn),檢索式為:()

A. computer? ? And Greater than 1999
B. computer* ? And Greater than 1999
C. computer? *And Greater than 1999
D. computer** And Greater than 1999

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