It is under the tilte "Parking and Mooring" that the instructions necessary to park and moor the aircraft in any of the probable conditions to which it may be subjected.

A. 参考修订FAR21.50的格式，应保持与使用的规范一致。

B. 修订应以FAR 21.50规定为基础，与其规范的格式一致。

C. 修订FAR 21.50规章的格式，应参考使用修订规范的格式要求。

A. 水和甲醇的混合物增加了发动机的功率。

B. 水和乙醇的混合物增加了发动机的功率。

C. 水的混合物和丙醇增加了发动机的功率。

A. It is not permit to work with any uncontrolled technical document for maintenance work.

B. It is not permitted to work with any uncontrolled technical document for maintenance work.

C. It is not allowed to work with any unreliable technical document for maintenance work.

A. 拆下螺栓和止动块。

B. 拆下螺帽和挡板。

C. 拆下螺钉和螺帽。

A. The computer consumes the energy based on these values calculations.

B. The computer calculates the energy consumption from these values.

C. The computer counts these values based on the energy costs.

A. This is the portion of the systems used to generate, regulate, control, and indicate AC electrical power.

B. Here is that portion of the systems used to generate, regulate, control, and indicate AC electronic power.

C. That is the portion of the systems used to generate, increase, control, and indicate AC electrical power.

A. The description could be pronounced in the active voice.

B. Descriptive content can be written in active voice.

C. You should read it in voice as you write the descriptive text.

A. 当控制手柄到DN位时，齿轮箱壳体会打开，齿轮松开并退出，壳体关闭。

B. 当控制手柄处于DN位置时，起落架舱门会打开，起落架解锁并伸出，然后舱门关闭。

C. 将控制手柄推到DN位置时，货舱门将打开，传动装置解锁可用，收回后则关闭。

A. The oil supply element and the three magnetic particle testing detectors are in the lubrication unit.

B. The oil supply filter and the three chip detectors are in the lubrication unit.

C. Position the oil supply filter assembly and the three magnetic chip detectors in the lubrication unit.

A. 应排布线路图，以便可以监测系统的最小流量。

B. 横隔板的布局方式使得追查系统流向的工作变得不费力气。

C. 图表的排列应便于花最小的力气即可追踪系统的流程。