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[单选题]
通道程序执行时，CPU处于 ( ) 运行
A
中断服务程序b.通道服务程序c.管态（运行I/O管理程序）d.目态（运行目态程序）
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试题答案：
D
答案解释：
该题考查通道处理的过程，当通道程序执行时，CPU处于目态运行，继续执行用户程序。所以D选项正确。
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