Potable system is that portion of the system which is used to store and deliver fresh drinking water.

A. 检查油管，对于磨损的区域。

B. 磨削管道并检查。

C. 检查管道是否磨损。

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. Make sure there is no leakage of hydraulic fluid at the router.

B. Make sure there is no leakage of hydraulic fluid at the transducer.

C. Make sure there is no leakage of hydraulic fluid at the transponder.

A. FAR规章适用于任何区别于通常的特型飞机，都必须遵守。

B. 任何特殊飞机所适用的规定都必须遵守，尽管这些规定可能与引用的FAR不同。

C. FAR对特殊类型的飞机的所有规定都必循遵照执行，不能偏离。

A. 包括折叠页和章节的起始页在内，所有页面均应双面打印。

B. 除折叠页外，章节的起始页和所有页面均应双面打印。

C. 除折叠页和章节的起始页外，所有页面均应双面打印。

A. 拆下故障部位后部的标签。

B. 排除故障后，拆下标签。

C. 出现故障后，拆下铆钉。

A. 仅在真正需要时才会使用被动时态。

B. 当真正需要时仅使用被动时态。

C. 当真正需要时仅使用主动时态。

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. 在另一个人的启发下安装盖子。

B. 在另一个人的帮助下安装盖子。

C. 在另一个人的帮助下安装螺帽。

A. Take care to the absence of leakage during the execution of each step in the valve test.

B. Throughout the valve test, verify that there are no obvious signs of leakage at each step.

C. Make certain that no leakage is present as you proceed with each step of the valve test.