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单选题
That portion of the system provides the major support for the aircraft while on the ground, including items such as shock struts, bogie axles, drag struts, doors, linkages, attach bolts, etc.
A
系统的这一部分能够为飞机在地面上提供主要支撑，包括减震支柱、轮架轴、阻力杆、门、连杆、固定螺栓等。
B
这部分系统为飞机在地面上提供主要支持，包括控制装置、管道、阻力支柱、门、连杆、上下门闩等。
C
这部分系统为飞机在地面上提供主要支持，包括旋转密封套、管道、防滑装置、门、连杆、连接栓等。
答案解析
正确答案：A
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