274、If contamination causes a blockage of more than 50 percent of the holes, then clean the holes on the
rear of the display units.

A. 　 Write the temperature on the engine record card.

B. 　 Record the temperature of the engine until writing it on the card.

C. 　 Recording the temperature of the engine is done by writing it on the card.

A. 　确保装置底部的两个接线板接合。

B. 　确保装置底部的两个插口接合。

C. 　确保装置底部的两个接线板接通。

A. 　这些 ALIs 是强制性的,未经负责飞机型号证书的 CFAA 办公室或适用的监管机构的批准,不能更改或删
除。

B. 　这些 ALls 是指令性的,未经 FAA 办公室批准不得更改或删除。FAA 办公室负责飞机型号证书,或发布适
用的管理规章。

C. 　这些 ALls 是非常必要的,任何更改或删除必须获得 FAA 办公室批准,或者其他可以颁发飞机型号证书的
监管机构的批准

A. 　检查流量控制管路,避免节流孔发生堵塞或被污染。

B. 　检查节流孔,避免流量控制管路发生堵塞和出现污染物。

C. 　检查流量控制孔,确保节流孔无堵塞和污染。

A. 　It is very important to explain the fuel safety precautions.

B. 　 It is very important to obey the fuel safety precautions.

C. 　 Combining the fuel safety precautions is very important.

A. 　 Dry the filter in an oven.

B. 　 Dry the filter in the cover.

C. 　 Dry the filter in the fire.

A. 　确保副翼向下运动。

B. 　使方向舵移动更慢些。

C. 　确保升降舵移动缓慢。

A. 　每个乘客的座位上的客舱娱乐系统可以传输音频和图像,也可以被连接到乘客系统的喇叭上。

B. 　视频娱乐的图像部分被传送到图像娱乐系统所选频道上的每个乘客的座位上,也可以被连接到乘客系统的
扬声器上

C. 　视频娱乐的音频部分被传送到音频娱乐系统中所选频道上的每个乘客的座位上,也可以被连接到乘客系统
的扬声器上。

A. 　 The elevators must move in an even manner.

B. 　 The elevators must keep moving accordingly.

C. 　 The elevators must move correspondingly.

A. 　 This organization was asked to look into the readability of maintenance documentation in the civil aviation
industry and find a resolution to simplify the language used to write such documentation.

B. 　 This organizations was asked to l research the legibility of maintenance documentation in the civil aviation
industry and get a way to simplify the language used to write such documentation.

C. 　 This organization was asked to study the readability of maintenance documentation in the civil aviation
industry and find a method to single out the language used to write such documentation.