如果你发现断了的电线，就把它们修好

A. All publications shall use the standard numbering system.

B. All documents and materials shall use the standardized numbering index system.

C. All publications shall use the standard numbering system for indexing.

A. The distribution system is used to store and distribute air pressure.

B. Distribution system is used to induct and distribute air.

C. Air inlet system is used to distribute air to all systems.

A. 描述飞机发动机时，应描述的发动机控制包括： 1.油门或功率控制 2.螺旋桨控制 3.混合控制 4.冷冻控制 5.涡轮增压器控制 6.摩擦止动装置

B. 描述飞机发动机时，应描述的发动机控制器包括： 1.油门杆或功率控制杆 2.螺旋桨控制 3.油气混合比控制 4.冷却控制器 5.涡轮增压器控制器 6.摩擦止动装置

C. 描述飞机发动机时，应描述的发动机控制包括： 1.油门或电源控制 2.螺旋桨控制 3.油气混合比控制 4.冷却控制 5.涡轮增压器控制 6.摩擦止动装置

A. Information on specific optional systems or equipment may be included in this section or in Section 9, Supplementary.

B. Information about noncompulsory systems or equipment may be included in this section or in Section 9, Supplements.

C. Information on specific optional systems or equipment may be included in this Section or in Section 9, Supplements.

A. Oxidation occurs very easily.

B. Oxygen occurs very easily.

C. Nitrogen occurs very easily.

A. The elevator is used for yaw control.

B. The rudder is used for yaw control.

C. The rudder is used for pitch control.

A. Pull out the circuit breaker.

B. Push in the circuit breaker.

C. Remove the circuit breaker.

A. 排放管使通风系统的燃油返回油箱。

B. 将从排气系统返回油箱的燃油排出。

C. 排放通风系统里剩余燃油,返回油箱。

A. The operation procedure requires that the maintenance behavior be logically executable.

B. The logical maintenance steps or operating procedures constitute the maintenance procedures.

C. Break down maintenance activities into logical steps or operations as required by procedures.

A. 飞机通信系统的组件和部件提供一种方式使得通信可以发生在飞机不同区域之间、飞机与飞机之间、地面台与地面台之间。

B. 飞机通信系统的组件和部件提供一种方式使得通信可以发生在飞机不同区域之间、飞机与飞机之间、飞机与地面台之间。

C. 飞机通信系统的组件和部件提供一种方式使得通信可以发生在飞机一个区域与另一个飞机之间、飞机与飞机之间、地面台与地面台之间。