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下面关于串的的叙述中,哪一个是不正确的:(单选) Which of the following descriptions about string is not correct? (There is only one correct answer)
A、串是字符的有限序列 String is a finite sequence of characters.
B、模式匹配是串的一种重要运算 Pattern matching is an important operation.
C、串是一种数据对象和操作都特殊的线性表 String is a linear list whose data objects and operations both special
D、空串是由空格构成的串 Empty string is a string consisting of spaces.
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