Remove the cover with a 1/2 inch wrench.

A. Because pressurized air can blow contamination away from the display unit, you should not use it to clean the holes behind the display unit in order to avoid damaging the equipment.

B. Do not use compressed air to clean the holes on the rear of the display unit. Compressed air will push contamination into the display unit. This can cause damage to the equipment.

C. Do not use compressed air to clean the holes behind the display unit, because it can blow contaminants into display unit which may be damaged.

A. A brush is cleaned by the filter element.

B. The filter element and a brush are clean.

C. Use a brush to clean the filter element.

A. 拆下并且标识预处理的包装。

B. 拆下并且丢弃预处理的组件。

C. 拆下并且丢弃预成型的封圈。

A. The airflow goes along the top and bottom surfaces of the slats.

B. The airflow can go between the top and bottom of the slats.

C. The air flows to the top and bottom of the slats＇ surfaces.

A. 在词典中给出的形容词都是原形，如果有比较级和最高级，以括号标示出。

B. 词典中每个被认可的形容词都列入基本表格，如适用，将其比较和最高级形式放在一起。

C. 词典中每个被认可的形容词都以原形给出，如适用，将加入比较级和最高级表格。

A. 应说明燃油的总量和可用燃油量，如果燃油可用量超过FAR 23部的限制，还应说明原因。

B. 应说明油箱容量和可用燃油量，如果不可用燃油量超过FAR 23部规章的限制，还应提供用于确定飞行中不可用燃油量的相关信息。

C. 燃油的总容量如果超出了FAR 23部的规定，还应确定飞行中不可用燃油的数量。

A. These airworthiness directives provide detailed information about continued airworthiness requirements for the manufacturer and owner/operator.

B. These service bulletins provide detailed information regarding continued airworthiness requirements for the manufacturer and owner/operator.

C. These advisory circulars provide specific information regarding continued airworthiness requirements for the manufacturer and owner/operator.

A. Use the upper latch mechanism to lock the lower display unit in the middle.

B. The latch mechanism at the top is used to secure the center display unit on the bottom.

C. The center lower display unit is installed with the latch mechanism at the top.

A. 在接近跑道过程中，偏差指针在航向指示器上显示飞行员正在朝哪个方向飞行。

B. 在接近跑道过程中，飞行员必须朝着航向指示器偏航指针的方向飞行。

C. 在接近跑道过程中，航向指示器的偏差指针向飞行员显示飞机必须向哪个方向飞行。

A. 定义措辞应尽可能简单，并必须符合手册中所定义的术语的使用。

B. 定义应尽可能简单地被记录，且必须保证手册中已定义术语的使用。

C. 定义应尽可能用词简单，且必须强制使用手册中规定的术语。