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单选题
每个系统包括基本部件和所有仪表、机械控制器，以及与系统有关的电气和液压组件。
A
Each system is composed of basic components and all equipment, mechanic controls and system related electric and hydraulic units.
B
Basic components and all apparatus are made up of each system, including mechanical controls and electrical and hydraulic units related sytem.
C
Each system includes the basic components and all instruments, mechanical controls, electrical and hydraulic units related to the system.
答案解析
正确答案：C
相关知识点：
系统含基本部件及相关件
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