3317. Those units and components which furnish a means of pressurizing, heating, cooling, moisture controlling, filtering and treating the air used to ventilate the areas of the fuselage within the pressure seals, as applicable ( )

A. 　In the event of loss of normal power, the backup power system offers AC and DC power for at least 60 minutes to the systems to maintain the flight safe.

B. 　In order to hold the flight safety, the standby power system supplies a minimum of 60 minutes of AC and DC power to systems when the normal power is not available.

C. 　If there is no normal power, the standby power system provides AC and DC power to systems necessary to keep safe flight for at least 60 minutes.

A. 　LEDs are simple and practical.

B. 　LEDs are complex and reliable.

C. 　LEDs are simple and dependable

A. 　只有经过授权的人员方可以留在该区域

B. 　只有经过改装的人员方可以留在该区域

C. 　只有经过检验的人员方可以留在该区域

A. 　However, manufacturers may omit System/Chapters that are not applicable to the product or combine Systems/Chapters where it is feasible.

B. 　However, manufacturers may adopt Systems/Chapters that are not applicable to the product or constitute systems/Chapters when necessary.

C. 　However , operators may omit Systems/Chapters applicable to the product or constitute Systems/Chapters where practical.

A. 　执行相关排故程序。

B. 　对有问题的程序进行修订。

C. 　解决急发故障问题。

A. 　If the repair scheme must be changed, the approval of the design authority is hardy got.

B. 　If the design authority need change the repair scheme, it can get the approval.

C. 　If it is necessary to change the repair scheme, get the approval of the design authority.

A. 　If as many as 50% of the holes are contaminated, you should clean the display units behinds the holes.

B. 　The holes on the bottom of the display unit should be cleaned once over 50% of them are clogged due to contamination.

C. 　If contamination causes a blockage of more than 50 percent of the holes,then clean the holes on the rear of the display units.

A. 　LOCK

B. 　JOINT

C. 　LINK

A. 　Air assemblies and parts, including pumps, regulators, piping, etc., used to produce, transport and regulate low pressure external air through the main manifold.

B. 　Those units and components used to generate, deliver and regulate below atmospheric pressure air, including pumps, regulators, lines, etc., through and including the manifold.

C. 　Parts of a system used to produce , transport and regulate air below atmospheric pressure , including pumps ,
regulators, ducts, etc.

A. 　当有金属碎片时,必须检查临近的泵。

B. 　当发现金属痕迹时,必须检查所有的泵。

C. 　当发现金属碎屑时,必须检查相应的泵。