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案例分析题Structured programming practices （） rise to Pascal，in which constructs were introduced to make programs more readable and better （） . C provided a combination of assembly language and high-level Structure to create a general-purpose language that could be used from system to （） programming. Next came object orientation，which is （） of a methodology and design philosophy than a language issue．This is （） by the addition of so-called OO extensions to current languages，such as C． Structured programming practices （） rise to Pascal.

A. giving
B. given
C. gave
D. gives

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案例分析题在Windows 2000操作系统中，要查看已知文件类型的扩展名，需要在磁盘目录下执行命令上（）设置；用键盘上的Delete键删除U盘中的文件时，该文件（）；在硬盘上要直接删除文件而不让文件进入回收站，可以用快捷键（）。在硬盘上要直接删除文件而不让文件进入回收站，可以用快捷键（）。

A. Ctrl+Delete
B. Alt+Delete
C. Shift+Delete
Delete

案例分析题Structured programming practices （） rise to Pascal，in which constructs were introduced to make programs more readable and better （） . C provided a combination of assembly language and high-level Structure to create a general-purpose language that could be used from system to （） programming. Next came object orientation，which is （） of a methodology and design philosophy than a language issue．This is （） by the addition of so-called OO extensions to current languages，such as C． C provided a combination of assembly language and high-level Structure to create a general-purpose language that could be used from system to （） programming.

A. logic
B. function
C. flexible
D. application

表示微机运算速度快慢的物理量为 (5) 。

A. 时钟频率
B. 每秒钟执行程序个数
C. 启动速度
D. 内存访问速度

若语音信号的带宽为50～400Hz，采样频率为50kHz，量化精度为8位，双声道，计算2小时的数据量为 (52) 。

A. 2880MB
B. 360MB
C. 720MB
D. 45MB