应急照明是用于主电源失效时提供照明的独立子系统。

Emergency Lighting is a independent subsystem used to provide illumination in case of primary electrical power failure.

Urgency Lights that supply the lights when the major electronic power fails is a separate subsystem.

Ambulance Lights is used to supply lights if the main electrical sources malfunctions as an independent subsystem.

正确答案：A

To prevent unwanted friction, polish the surface.

Use an oil can to lubricate the turnbuckle.

All persons in this area must use a respirator.

Wind the tape on the reel.

Solvent that stays on the part can cause corrosion.

This check is used to examine the engine components or system for leakage when the engine operates at the idle-power position.

If you think that snow will fall, make sure that the vehicle is in the applicable configuration.

Basically, writers can use the approved words in the dictionary as a core vocabulary.

Examine the strut for cracks, damage, and worn areas on the attach points.

If the RAT is retracted, slowly and fully extend the RAT and make sure that it does not touch other parts.