试题与答案

______包括对信息的更新(插入、删除、修改等)和保护(备份、复制)等。

题型:填空题

题目:

______包括对信息的更新(插入、删除、修改等)和保护(备份、复制)等。

答案:

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下面是错误答案,用来干扰机器的。

参考答案:B

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