Distribution of cabin air on pressurized aircraft is managed with a system of air ducts leading from the pressurization source into and throughout the cabin. Typically, air is ducted to and released from ceiling vents.

A. The supplements of CAP are the airplane＇s maintenance manual (or Instructions for Continuing Airworthiness). The CAP is the primary document containing the aircraft＇s continuous airworthiness procedures.

B. The airplane＇s maintenance manual (or Instructions for Continuing Airworthiness) serves as the main document that contains the procedures to ensure the continuing airworthiness of the airplane. CAP is a supplementation to the manual.

C. CAP supplements the airplane＇s maintenance manual (or Instructions for Continuing Airworthiness). The supplements are the major document and involve in the procedures for the continuing airworthiness of the airplane.

A. Obey the safety precautions when you do work with high voltages.

B. When working with high resistances, you should follow the safety precautions.

C. The safety precautions are optional in an environment with high voltages.

A. 解除离合器可以防止启动发动机时发生意外。

B. 在启动发动机之前，脱开离合器。

C. 拆卸离合器，启动发动机。

A. Use schematics and drawings to briefly explain the operation of the system, including warning devices and control features during use.

B. Making use of simplified schematics and drawings explain how this system operates, including warning devices and control features in use.

C. The simplified diagrams and drawings are the indication of the system operation, including warning devices and control features in use.

A. Quickly turn on the oxygen system, the mask begins to supply oxygen.

B. Pull the oxygen mask with a sudden movement to start the flow of oxygen.

C. Suddenly start the oxygen supply system, the mask drops.

A. Tighten the threads, nuts, clips, or connectors to the correct torque.

B. Tighten the bolts, nuts, clamps, or connectors to the correct torque.

C. Tighten the bolts, spacers, clips, or connectors to the correct torque.

A. 描述飞机起落架时，应说明应急展开系统。

B. 描述飞机起落架时，应描述起落架应急放出系统。

C. 描述飞机起落架时，应说明应急逃生系统。

A. 从安装位置向上提起气瓶。

B. 向上提起做动筒到安装位置。

C. 提起并安装气缸到位。

A. Do not extend or retract landing gear above this speed.

B. Do not lower or retract landing gear exceed this speed.

C. Do not lower or lift landing gear within this speed.

A. Augment the pressure slowly (no less than one turn each minute).

B. Increase the pressure slowly (not more than one turn each minute).

C. Release the pressure slowly (not more than one turn each minute).