长秒针只与时钟计时功能配合使用。

A. Ground service bus has no power, but the external power can be supplied.

B. Ground service bus is not energized with external power.

C. Ground service bus is power off when external power is supplied.

A. Vigorously scrub the surface with a rough, dry cloth.

B. Polish the surface with a soft, damp cloth.

C. Rub the surface quickly with a soft, dry cloth.

A. This specification provides for the preparation and insurance of more complex manuals for less complex aircraft than aircraft operated by large scheduled airlines, while achieving industry-wide standardization of naming and formatting.

B. The specification is used to prepare and release simpler manuals for less complicated aircraft rather than the aircraft operated by large scheduled airlines while achieving industry-wide standardization of terminology and format.

C. This specification specifies the preparation and release of less complex manuals for aircraft that are less complex and operated by large scheduled airlines, and realizes the industry wide standardization of terms and formats.

A. 升降舵/升降副翼是可拆卸翼面，用于纵向控制/纵向和横向控制。

B. 升降舵/升降副翼是可移动翼面，用于纵向控制/纵向和侧向控制。

C. 升降舵/升降副翼是可拆卸翼面，用于纵向控制/纵向和水平控制。

A. "Maintenance Practices" include servicing, removal/installation, adjustment/test, inspection/check, cleaning/painting, and approved repairs. "Maintenance Practices" should obey the instructions of the Troubleshooting Section.

B. "Maintenance Practices" include servicing, removal/installation, adjustment/test, inspection/check, cleaning/painting, and approved repairs. "Maintenance Practices" should be located after the Troubleshooting Section.

C. "Maintenance Practices" include servicing, removal/installation, adjustment/test, inspection/check, cleaning/painting. And approved repairs should be located after the Troubleshooting Section.

A. If a power supply system is independent to provide service to only one component or single-function system, it will be discussed together with the components or systems it serves.

B. When a power source services a single component, or serves a single functioning system, that power source will be included in the discussion of the component or system which it serves.

C. When a power supply is a complete component or single-function system, the device it serves is discussed separately from its own component or system.

A. For inspections, repair and overhaul of the aircraft and its systems and units, those producers recommended time limits and life of parts if possible.

B. Those manufacturers recommended time limits for inspections, maintenance and overhaul of the aircraft, its systems and units, and life of parts, as applicable.

C. Those manufacturers gave time restrictions to inspect, repair and maintenance the aircraft, its systems and units, and according to the situation they gave the life of parts .

A. Section 1 of the Pilot＇s Operating Handbook shall introduce basic data and information of general interest to the pilot. The data and information is useful in loading, sheltering, handling, and routine preflight checking of the airplane.

B. Section 1 of the Pilot＇s Operating Handbook shall present basic data and information of general interest to the pilot. The general interest is useful in loading, sheltering, handling, and routine preflight checking of the airplane.

C. Section 1 of the Pilot＇s Operating Handbook shall present basic data and information of general interest to the pilot. The pilot is useful in loading, sheltering, handling, and routine preflight checking of the airplane.

A. 复合板材使搭接处更坚固。

B. 加强板使搭接接头更坚固。

C. 经过再次强化的板材使搭接凸缘承力更强。

A. 涂料足够柔软，用塑料铲子将其去除。

B. 涂料足够柔软，用塑料楔子将其去除。

C. 涂料足够柔软，用胶铲子将其去除。