Tell person A to remove the chocks.

A. 描述飞机燃油系统时，应解释燃油测量系统并阐述检测和校对的需要。

B. 描述飞机燃油系统时，应解释燃油计量系统并阐述检查和修正的需要。

C. 描述飞机燃油系统时，应说明燃油测量系统并阐述监控和校正的必要性。

A. Dust can contaminate all areas.

B. Dirts are contamination of all filters.

C. Dust can cause contamination on all filters.

A. During antenna installation, disregard the direction the alignment arrow is pointing.

B. Align the antenna in the opposite direction in consideration of the alignment arrow in installation.

C. When installing the antenna, make sure the alignment arrow is directed towards the front.

A. 当达到预设阈值时，烟雾探测器通过客舱内部通信数据系统触发警告。

B. 当预设的温度达到时，烟雾探测器会发出警告，通过客舱内部通信数据系统。

C. 当预设的数值达到时，客舱内部通信数据系统里的烟雾探测器会发出警告。

A. 描述飞机的门、窗和出口时，应描述如何关闭飞行中意外打开的门或窗，以及如需在飞行中打开门或窗时，须遵守的任何限制。

B. 描述飞机舱门、窗和出口时，应阐述在飞行中意外掉落的门或窗如何关闭，以及对飞行中可能存在的故意打开的任何限制。

C. 描述飞机舱门、窗和出口时，应阐述在飞行中意外打开的门或窗如何关闭，以及对飞行中可能存在的无意打开的任何限制。

A. Do not omit articles to make the sentence shorter, because this can cause ambiguity.

B. Do not make the sentence shorter to omit articles, because this can cause ambiguity.

C. Do not omit articles to avoid ambiguity, because this can make the sentence shorter.

A. 使用良好的设备去做这项检查以及目视检查。

B. 使用正确的设备去做这项检查而不是目视检查。

C. 使用正常的设备去做这项检查而不是目视检查。

A. The responsibility of ABC is not to modify the airplanes that belong to STC.

B. It is not STC＇s responsibility to modify ABC＇s aircraft.

C. ABC is not in charge of the aircraft modified by STC.

A. 该扭力轴无法向内侧旋转，因此在拆下前，应先拆下外旋扭力轴。

B. 禁止将该扭力轴向内侧移动。因此，在拆下前，应先拆下外侧扭力轴。

C. 该扭力轴不能向内侧移动，因此在拆下之前，应先拆下外侧扭力轴。

A. When you restore the airplane to its normal condition, make sure the pin is released from the release mechanism.

B. Ensure to remove the pin from the let-go mechanism after you return from the airplane to its common position.

C. When the airplane is in good condition, you must uninstall the pin of the release mechanism.