A. Everything seemed to be changing. B. People were formal and disciplined. C. People were excited to go travelling overseas. D. Things from the Victorian era came back alive.
A. 实现对文件的按名存取 B. 实现虚拟存储 C. 提高文件的读写速度 D. 保护用户文件不丢失
A. 数据项 B. 关键字 C. 记录 D. 文件
A. 对 B. 错
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