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单选题
In the description of the airplane＇s Stall Warning or Angle of Attack System, the manual shall: (a) If either of these devices is installed, explain whether it is required equipment. (b) Explain the principle of operation. (c) Explain how to check the system and use it. (d) Discuss how to recognize a malfunction and when not to depend on it.
A
描述飞机失速警示系统或迎角系统时，手册应：
（a）如果安装了其中任何一个，说明是否为必需设备。
（b）说明操作原理。
（c）说明检查和使用系统的方法。
（d）阐述如何识别故障以及何时应依靠该系统。
B
描述飞机失速警告系统或迎角系统时，手册应：
（a）如果安装了其中任何一个，说明其是否为必需设备。
（b）说明其操作原理。
（c）说明该系统的检查和使用方法。
（d）阐述如何识别故障以及何时不依靠该系统。
C
描述飞机失速报警系统或迎角系统时，手册应：
（a）如果安装了其中任何一个，说明是否为必需设备。
（b）说明操作原理。
（c）说明体系性检查和使用方法。
（d）阐述如何识别故障以及何时不依靠该系统。
答案解析
正确答案：C
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