单选题:线性表L=(al,a2,a3,…ai,…an),下列说法正确的是(  )。

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  • 题目类型:单选题
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题目内容:
线性表L=(al,a2,a3,…ai,…an),下列说法正确的是(  )。 A.每个元素都有一个直接前件和直接后件
B.线性表中至少要有一个元素
C.表中诸元素的排列顺序必须是由小到大或由大到小
D.除第一个元素和最后一个元素外,其余每个元素都有且只有一个直接前继和直接后继

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