Hold the cylinder tightly.

A. 《飞行员操作手册》是FAR第23部规章的审定要求，通勤类飞机除外。

B. 《飞行员操作手册》对有FAR第23部规章审定基础的飞机是恰当的，通勤类除外。

C. 《飞行员操作手册》适用于通过FAR第23部规章审定的飞机，但通勤类飞机除外。

A. 必须要注意不要损坏防火墙罩。

B. 小心损坏火墙盖子。

C. 核心必须要带走以不损坏防火墙罩。

A. It includes cardinal rigging dimensions used in checking damaged aircraft or aircraft undergoing major repair .

B. It includes the basic rigging dimensions for inspection of damaged aircraft or aircraft is undergoing major repairs.

C. Basic rigging dimensions for inspection of damaged aircraft or aircraft experienced major repairs should be included.

A. 涡轮发动机包括用于控制通过发动机空气流量的压缩机排气系统，用于发动机除冰的冷却空气系统，以及发动机启动系统。

B. 涡轮发动机包括压气机引气系统、空气冷却系统、热空气系统、发动机启动系统，其中压气机引气系统能控制通过发动机的空气流量，空气冷却系统和热空气系统用于发动机防冰。

C. 涡轮发动机包括控制通过发动机空气流量的压气机引气系统、空气冷却系统、用于发动机防冰的热空气系统和发动机启动系统。

A. The units and components which store, regulate, and deliver oxygen to the passengers and crew include oxygen bottles, relief valves, shut-off valves, outlets, regulators, masks, etc.

B. The units and components which reserve, adjust, and transfer oxygen to the passengers and pilots include oxygen bottles, relief valves, shut-off valves, outlets, regulators, masks, etc.

C. The units and components to store, adjust, and transfer oxygen to the passengers and crew include oxygen bottles, release valves, shut-off valves, outlets, regulators, masks, etc.

A. 此步骤可以确保燃油泵工作正常。

B. 燃油泵必须要经过这个阶段才能正常工作。

C. 通过这个步骤保证燃料能够到泵的位置。

A. Magnetic tools have an unwanted effect on the compass system.

B. Metallic tools are of positive effect on the compass system.

C. Magnets can affect the compass system adversely.

A. Make sure that the pressure in the cabin is almost zero.

B. Verify that the cabin pressure is not above zero.

C. Ensure that the pressure in the cabin is completely zero.

A. 缠紧卷轴上的发条。

B. 将胶带缠绕在卷筒上。

C. 将胶带粘贴在线圈上。

A. 如果发动机灭火系统可以使用，描述，给出操作原则，并说明如何使用。

B. 如果有发动机火警探测系统，描述、给出工作原理，并说明如何使用。

C. 如果发动机火警探测系统正常工作，描述，给出操作方法，并说明如何使用。