单项选择题

Which of the following would require real-time processing______.

A．Playing a computer game
B．Executing a program that predicts the state of economy
C．Printing labels
D．Listening the music

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单项选择题

关于三种备份方式：完全备份、差量备份和增量备份的联系和区别，说法错误的是______。

A．完全备份较之差量备份，所需要的资源和时间较多
B．差量备份比增量备份需要更长的时间
C．差量备份与增量备份混杂使用，可能会造成文件丢失
D．差量备份恢复时间较增量备份短

单项选择题

（）Development is a structured design methodology that proceeds in a sequence from one phase to the next.

A. Waterfall
B. Phased
C. Prototyping
D. Parallel

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