单项选择题

在项目建设过程中，负责项目日常监理工作和一般性监理文件签发的是______。

A．总监理工程师
B．总监理工程师代表
C．专业监理工程师
D．监理员
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单项选择题
A ______ infected computer may lose its data.
A. file
B. database
C. virus
D. program
单项选择题
As an operating system repeatedly allocates and frees storage space, many physically separated unused areas appear. This phenomenon is called ______.
A. fragmentation B. compaction
C. swapping
D. paging
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