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单选题
3267. 清洁位于机长主飞行、导航与中下发动机显示组件后侧的通风孔的所有棉绒、灰尘和碎屑。
A
The captain＇s primary flight, navigation, and center lower engine display units must be cleaned since the ventilation holes behind them are clogged by lint, dust and debris.
B
Clean the vent holes behind the captain＇s primary flight navigation and lower middle engine display units which are blocked by lint, dust and debris.
C
Clean all lint, dust and debris from the ventilation holes located on the aft side of the captain＇s primary flight navigation, and center lower engine display units.
答案解析
正确答案：C
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