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单选题
外舱门主要用于为勤务飞机系统和设备提供接近，包括结构件、闩锁机构、把手、隔热材料、内衬、操纵装置等物品。
A
The interior doors are used primarily to gain access for servicing aircraft systems and equipment. Include items such as structure, latching mechanisms, switch, insulation, lining, controls, etc.
B
The exterior doors are used primarily to gain access for servicing aircraft systems and equipment. Include items such as structure, latching mechanisms, switch, insulation, controls, etc.
C
The exterior doors are used primarily to gain access for servicing aircraft systems and equipment. Include items such as structure, latching mechanisms, handles, insulation, lining, controls, etc.
答案解析
正确答案：C
