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单选题
That portion of the system which supports the nose of the aircraft while the aircraft is on the ground, including items such as shock struts, drag struts, doors, linkages, attach bolts, etc.
A
当飞机在地面上时支撑飞机机头的那部分系统，包括减震支柱、阻力支柱、门、连接装置、固定螺栓等。
B
当飞机在地面上时支撑飞机机头的那部分系统。包括刹车、浮子、门、轮胎、固定螺栓等。
C
当飞机在地面上时支撑飞机机头的那部分系统。包括驱动机构、转向架饰件、门、跳板、上下门闩等。
答案解析
正确答案：A
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