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单选题
Each Supplement shall normally cover only a single system, device, or piece of equipment such as an autopilot, electric trim, or an area navigation system.
A
每一“补充程序” 通常应只包括单一的系统、装置或设备，如自动驾驶仪、电子削减器或区域导航系统。
B
每个“补充程序” 通常只包括一个单独的系统、装置或部分设备，如自动驾驶仪、电动调节装置或区域导航系统。
C
“补充程序” 通常仅针对单个系统、装置或设备，如自动驾驶仪、电动配平、或区域导航系统。
答案解析
正确答案：B
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