7.The navigation lights change from dim to bright.

A. If the rush air turbine has been extracted.

B. If the Ram Air Turbine (RAT) is retracted.

C. If the pushed air turbin has been extended.

A. Clean all lint,dust and debris from the ventilation holes located on the aft side of the captain'sprimary flight,navigation,and center lower engine display units.

B. Clean the vent holes behind the captain's primary flight,navigation and lower middle engine display units which are blocked by lint,dust and debris.

C. The captain's primary flight,navigation,and center lower engine display units must be cleaned since the ventilation holes behind them are clogged by lint,dust and debris.

D. C.The captain's primary flight,navigation,and center lower engine display units must be cleaned since the ventilation holes behind them are clogged by lint,dust and debris.

A. The following synonyms are used interchangeably throughout this section and they are the sample of one system and device respectively.

B. The following antonyms are used interchangeably throughout this section and they present the same system and device partly.

C. The following acronyms are used interchangeably throughout this section and they represent the same system and device respectively.

A. 仔细评估损伤区域。

B. 仔细测量损伤区域。

C. 仔细评估磨损区域。

A. 当飞机处于常态速度和巡航仰角时,通气油箱内的燃油将排放到主燃油箱内。

B. 当飞机处于恒定速度和巡航俯仰角时,通气油箱内的燃油将排放到主燃油箱内。

C. 当飞机处于超常速度和巡航俯仰时,通气油箱内的燃油将排空到主燃油箱内。

A. Some jobs or processes consist of several basic operations,with a number of minor steps or work items under each.

B. Some basic operations with a few small steps or work items are included in some work or processes.

C. Some jobs or processes constitute a few basic operations,with several minor steps or work items under each.

A. Make sure the drain hose's open end is oriented in align with the structure.

B. Direct the open end of the drain hose away from the storage construction.

C. Ensure that the open end of the drain hose faces away from the structure.

A. If they fail,temporary damage can occur.

B. If they drop,permanent injury can occur.

C. If they fall,permanent damage can occur.

A. 仅在真正需要时才会使用被动时态。

B. 当真正需要时仅使用被动时态。

C. 当真正需要时仅使用主动时态。

A. The cover title shall be "Pilot's Operating Handbook" or "Polit's Operating Handbook and FAA Approved Airplane Flight Manual."

B. The name of the book might be "Pilot's Operating Handbook" or "FAA Approved Airplane Flight Manual."

C. The cover could be named as "Pilot's Operation Instruction" or "Pilot's Operation Instruction and FAA Approved Airplane Flight Instruction."