试题与答案

以下哪些设备的使用年限为6年?()A、CCD摄像机B、电视监视器C、数字硬盘录像机D

题型:多项选择题

题目:

以下哪些设备的使用年限为6年?()

A、CCD摄像机

B、电视监视器

C、数字硬盘录像机

D、室外云台

E、入侵探测器

F、报警控制器

答案:

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