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单项选择题

在Visual FoxPro中,下列表达式中运算结果为“good”的是()

    A.SUBSTR("mygoodfriend",AT("good","mygoodfriend"))
    B.SUBSTR("mygoodfriend",2,4)
    C.RIGHT(LEFT("mygoodfriend",6),4)
    D.LEFT(RIGHT("mygoodfriend",AT("good","mygoodfriend")),4)

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