3322. The separate and independent subsystems used to provide illumination in case of primary electrical power failure Includes items such as inertia flashlights, lanterns, etc ( )

　如果主电源故障时提供照明的单独和独立子系统。包括带电池的手电简、提灯等物品。

　如果初级电源故障时提供燃烧的单独和独立子系统。包括带电池的手电简、提灯等物品。

　如果主电源故障时提供照明的单独和独立子系统。包括不带电池的手电筒、矿灯等物品。

正确答案：A

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