A、 必要时，应使用示意图来指示“流量”，并以尽可能直接的方式说明空气控制、电气、流体动力、燃料和涡轮系统的操作。
B、 必要时，应使用示意图显示“工作流程 ”，简洁明了地显示气源系统、电源系统、液压系统、燃油系统和涡轮系统的运行。
C、 必要时应使用示意图，以表明“流向”，并以尽可能直接的方式说明空气控制、电气、流体动力、燃料和涡轮增压系统的操作。
答案：C
A、 必要时，应使用示意图来指示“流量”，并以尽可能直接的方式说明空气控制、电气、流体动力、燃料和涡轮系统的操作。
B、 必要时，应使用示意图显示“工作流程 ”，简洁明了地显示气源系统、电源系统、液压系统、燃油系统和涡轮系统的运行。
C、 必要时应使用示意图，以表明“流向”，并以尽可能直接的方式说明空气控制、电气、流体动力、燃料和涡轮增压系统的操作。
答案：C
A. A certificated pilot who owns or operates an airplane not used as an air carrier is authorized by FAR Part 43 to perform limited preventive maintenance on his airplane.
B. A certificated pilot who owns or operates an airplane that is not airworthy can perform limited predictive maintenance on his airplane authorized by FAR Part 43.
C. A licensed pilot authorized by FAR Part 43 who owns or operates an airplane not used to operate can perform time-limited maintenance on his airplane.
A. Set the tension indicator to zero.
B. Put the torque indication to zero.
C. Put the shear instrument to zero.
A. Handbooks shall be ready to revise in accordance with the specification.
B. In accordance with the specification, manuals should be easy to revise.
C. Handbooks have been already revised, according to the specification.
A. 使用多余的清洁剂清洁该区域。
B. 清除该区域多余的密封胶。
C. 在该区域内清理有害的密封剂。
A. Refer to chapter 6 for instructions on how to park the aircraft in bad weather conditions.
B. Chapter 6 instructions are referred to how to park the aircraft in bad weather conditions.
C. Referring to chapter 6 to park the aircraft in bad weather conditions.
A. OEUs将主汇流条上的5V交流电转换成115V交流电以供给排呼叫灯和12V交流电的阅读灯。
B. OEUs将来自主汇流条的115V交流电转换成用于排呼叫灯的5V交流电和用于阅读灯的12V交流电。
C. OEUs将来自主汇流条的115V交流电转换成5V和12V的直流电，用于排呼叫灯和阅读灯。
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. Because of the risk of contamination, you must do this task in a very clean environment.
B. To prevent environmental pollution, this task must be done in a very clean area.
C. In order to prevent contamination, the task you must do is to find a very clean environment.
A. Do not replace the self-locking nuts with plain nuts.
B. Do not use a general fastener instead of a self-locking one.
C. The general purpose nut is interchangeable with the self-locking nut.
A. A towel is not used to dry the surface.
B. Use a towel to dry the surface.
C. The surface is dried without a towel.
