The　relational　database　model　requires　the　data　be(110)through　programs　that　don’t　rely　on　the　position　of　the　data　in　the　datab

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问题 The　relational　database　model　requires　the　data　be(110)through　programs　that　don’t　rely　on　the　position　of　the　data　in　the　database.　This　is　in　direct(111)to　the　other　database　mode,　where　the　program　has　to　follow　a　series　of　pointers　to　the　data　it　seeks.　A　program(112)a　relational　database　simply　asks　for　the　data　it　seeks;　the　DBMS　performs　the　necessary　searches　and(113)the　information.　The(114)on　how　the　search　is　done　are　specific　to　the　DBMS　and　vary　from　product　to　product.　

选项 A、accessed
B、moved
C、read
D、wrote

答案A

解析

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