This system shows the pilot the deviations from the localizer course and the glideslope path.

A. 交流电源系统设计避免同一个电源同时给两个负载供电。

B. 交流电源系统设计防止两个电源同时向同一负载供电。

C. 备用电源系统被设计成避免两个电源同时向同一用户供电。

A. 注释应该在简化、缩短文章或使文章更易于理解时被使用。

B. 只要可以简化、缩短文本或使文本更易于理解，都应使用插图。

C. 缩略语应该用在所有需要简化、缩短文章或使文章易于理解的时候。

A. Do the weighing procedure in this sequence.

B. In this order to perform the swapping procedure.

C. In this sequence to do the analysis procedure.

A. This system is used to assist or avoid the formation of ice on masts and fairings.

B. This system is used to eliminate or prevent the formation of ice on antennas and radomes.

C. This system is used to get rid of or escape the formation of ice on probes and domes.

A. The seat shall be lifted to leave the track locked.

B. Lift the seat until it is away from the track locks.

C. Eject the seat until it is isolated from the track locks.

A. 文件必须经常修订。

B. 文件必须易于修订。

C. 文件必须容易阅读和看见。

A. The air conditioning cooling system supplies cooled air to the cabin. Includes items such as the cooling unit, indicating systems related to the cooler operation, etc.

B. The air conditioning cooling system supplies cold air to the passenger cabin. Includes items such as the cooling unit, indicating systems related to the cooler operation, etc.

C. The air conditioning cooling system supplies cooled air to the passenger cabin. Includes items such as the cooling pack, indicating systems related to the cooler operation, etc.

A. If you do not secure the rigging pin, the elevators will descend when there is pressure in the system.

B. If you do not install the rigging pin, the elevators will move down when there is no pressure in the system.

C. Without the rigging pin installed, the elevators will not lower when there is no pressure in the system.

A. Recommending or requiring life limited components is on the right side of the page in an appropriate margin.

B. Recommended or required retirement time of life limited parts is on the right side of the page in an appropriate space.

C. The required retirement time of life limited components is located on the right side of an appropriate space.

A. All aircraft engines must meet certain general efficiency, economy, and reliability requirements, which require that the ignition system can provide ignition pulses at the proper time to the spark plug in various weather and other adverse conditions.

B. All aircraft engines must meet certain overall efficiency, economy and reliability requirements, which require the ignition system should provide ignition pulses at appropriate times under meteorological and other unfavorable conditions.

C. All aircraft engines must meet certain general requirements of reliability, economic and efficiency, which dictates the use of ignition systems that deliver the firing impulse to the spark plugs in all kinds of weather and under other adverse conditions.