663.Those removable coverings which extend over and around the power plant assembly ( )

A. 　特定手册中使用的定义应适用于该特定的飞机或装置。

B. 　对特定手册的说明应针对特定飞机或装置。

C. 　特定手册中的定义应依据特定飞机或构型制定。

A. 　The intermediate pressure check valve prevents air from the fourth stage into the HP/IP manifold.

B. 　The intermediate pressure check valve prevents air from going into the fourth stage bleed air source.

C. 　The intermediate pressure check valve is interchangeable with the bleed valve.

A. 　Sentence forms shall be simple and direct avoiding the obvious,the elementary and discussions of theory except where essential for practical understanding and application.

B. 　Sentence forms shall be simple and direct, avoiding the obvious and the elementary, and omitting discussions of theory except where essential for practical understanding and application.

C. 　Sentence forms shall be simple land direct iso as to avoid the obvious and the elementary, and to omit discussions of theory except where essential for practical understanding and application.

A. 　The zonal dryer system can reduce the moisture in the crown area of the passenger cabin so the condensation on the inner surface of the fuselage skin is decreased.

B. 　The zonal dryer system lets the water in the crown area of the passenger cabin go down in order to reduce the condensation on the inner surface of the fuselage skin.

C. 　The zonal dryer system dries the crown area of the passenger cabin so as to accelerate the condensation on the inner surface of the fuselage skin.

A. 　This chapter gives general maintenance procedures.

B. 　This section gives overall maintenance procedures.

C. 　This section gives general maintenance procedures.

A. 　That portion of the system and its controls which supply environment air to the cabin. Includes items such as controls and indicating systems related to the compressors, etc., if applicable. Does not include the stress control and indicating system for the cabin pressurization.

B. 　That portion of the system and its controls which supply compressed air to the cabin. Includes items such as controls and indicating systems related to the compressors, etc., if applicable. Does not include the pressure control and indicating system for the cabin pressurization.

C. 　That portion of the system and its controls which supply compressed air to the cockpit. Includes items such as controls and indicating systems related to the compressors, etc., if applicable. Does not include the pressure control and indicate system for t he cabin pressurization.

A. 　The boost pumps supply trim tank fuel to the engine feed manifold.

B. 　The boost pumps supply main tank fuel to the APU.

C. 　The boost pumps supply main tank fuel to the engine feed manifold.

A. 　One text page and one illustration page is usually made up of this Program.

B. 　One text page and one illustration page usually constitute this Program.

C. 　This Program is usually consisted of two pages: one text page and one figure page.

A. 　Each system is composed of basic components and all equipment, mechanic controls and system related electric and hydraulic units.

B. 　Basic components and all apparatus are made up of each system , including mechanical controls and electrical and hydraulic units related system.

C. 　Each system includes the basic components and all instruments, mechanical controls, electrical and hydraulic units related to the system.

A. 　用黑色字体在页面外侧对改版、补充和删除进行说明,对应于已经更改的部分打印内容。

B. 　应在书页外侧以垂直黑线标记修订、增加和删除之处,仅对应于印刷件中已更改的内容。

C. 　对于经过修订和增删的文字,沿书页外侧用粗黑直线加以标识,并仅打印修改。内容部分。