问题
单项选择题
文件的物理结构通常包括顺序结构、链接结构、索引结构、杂凑结构和索引顺序结构，其中顺序结构的优点是________。
A．访问速度快
B．文件长度容易动态变化
C．存储开销小
D．上述说法都不对
答案
参考答案：A
解析：[评析] 在文件的物理结构中，顺序结构最大的优点是访问速度快，缺点是文件长度不能动态改变。
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文件的物理结构通常包括顺序结构、链接结构、索引结构、杂凑结构和索引顺序结构，其中顺序结构的优点是________。
A．访问速度快
B．文件长度容易动态变化
C．存储开销小
D．上述说法都不对
参考答案：A
解析：[评析] 在文件的物理结构中，顺序结构最大的优点是访问速度快，缺点是文件长度不能动态改变。
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