Do the backup of the computer at regular intervals.

A. The AFDS monitors three separate autopilot channels and a single Mode Control Panel(MCP)

B. The AFDS constitutes three separate autopilot channels and a single Mode Control Panel(MCP)

C. The AFDS contains three separate autopilot channels and a single Mode Control Panel(MCP)

A. Clamps should be spaced at intervals not exceeding 24 inches. Clamps on wire bundles should be selected so that they have a snug fit without pinching wires.

B. Pins should be spaced at intervals not exceeding 24 inches. Pins on harness should be selected so that they have a snug fit without pinching wires.

C. Pins should be spaced at intervals not exceeding 24 inches. Pins on harness should be selected so that they have a snug fit without scratching wires.

A. 风扇有自动开关用以保护风扇过热受损。

B. 风扇有保护电门用以防止风扇过度受损。

C. 风扇有热电门用以避免风扇过热受损。

A. The turbine rotates by a reduction gear,gives tolerance to the HP shaft,so it can drive the engine and the aircraft accessories.

B. The turbine turning through a reduction gear, applies a torque to the HP shaft, thus driving the engine and the aircraft components.

C. The turbine turning through a reduction gear, applies a torque to the HP shaft, thus driving the engine and the aircraft accessories.

A. 当维修程序不要求很长且其相关内容简单，则这些内容可以和维修实践编辑在一起。

B. 当所需的维修程序不长且相对简单时，可以将上述的内容组合在一个标题下，称为维修实践。

C. 当要求维修程序不得过长、内容简明扼要时，可以将上述内容进行组合，编入维修实践中。

A. Use a fan to suck the gases.

B. Use a turbine fan to remove the gases.

C. Use a fan to remove the gases.

A. After three full cycles, extend and retract the actuator.

B. You should extend and retract the actuator through three complete cycles.

C. Do nothing to the actuator after three complete cycles.

A. Humidity adjustment is manual.

B. Pressure adjustment is automatic.

C. Temperature adjustment is automatic.

A. Make an estimate of the necessary quantity.

B. Evaluate on the quantity available.

C. Approximate the scale of the quality.

A. 将飞机停放或存放在正常或发动机不在翼、飞机受损等;短期或长期暴露在极端天气中等异常条件下的必要说明，

B. 将飞机停放或存放在正常或发动机受损、飞机受损等;短期或长期暴露在极端天气中等异常条件下的必要说明，

C. 将飞机停放或存放在正常或发动机不可用、飞机受损等;短期或长期暴露在极端天气中等异常条件下的必要说明，