503. 遵守安全说明

A. 这类技术名词仅适用于描述性内容,如一般信息、系统综述和操作文本以及服务公告的综述部分。

B. 这类技术形容词仅适用于描述性文本如一般信息系统描述和操作文本以及服务协会的描述部分。

C. 这类技术动词仅适用于描述性内容,如概述信息、系统描述和操作步骤以及服务通告的描述部分。

A. 当风速减小到30 节以下,可以打开货舱门。

B. 当风速达到30 节,仍然允许打开货舱门。

C. 当发动机转速减小到30 节以下,可以打开货舱门。

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. 用滑石粉处理该区域。

B. 在该区域涂抹滑石粉。

C. 撒滑石粉在该区域。

A. 测量跑道灯连接的电阻。

B. 校准跑道灯连接的电阻。

C. 复核跑道灯连接的电阻。

A. Do these two steps at the same time;

B. Do these two steps step by step;

C. Do these two steps one after another;

A. 将飞机速度除以侧风分量来得到修正。

B. 用侧风分量除以飞机速度,得到修正值。

C. 将侧风部件和飞机分开,来得到正确的速度。

A. 涡轮发动机速度表通常以涡轮最大转速的百分比来测量转速。

B. 涡轮发动机转速表通常以涡轮额定最大转速的百分比来测量转速。

C. 涡轮发动机速度计通常以涡轮转动的最大速度的百分比来衡量。

A. In designing schematic diagrams, it may be necessary to combine two aspects: specification necessary to make the diagram clear, And the simplicity essential for ease of reading and understanding.

B. In designing schematic diagrams, it may be necessary to comprehend two aspects: detection necessary to make the diagram self-contained, And the simplification essential for ease of reading and understanding.

C. In designing schematic diagrams, it may be necessary to compromise two aspects: detail necessary to make the diagram self-explanatory, And the simplicity essential for ease of reading and understanding.

A. If possible, do an engine ground run to make sure that you get the same indications.

B. If possible, run the engine on the ground to confirm that you get similar indications.

C. In order to verify the instructions, the engine run-up should be possibly conducted on the ground.