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单选题
There are three types of placards and markings. A. Safety Data: These placards and markings are used for the flight crew, and passenger cabins, and for equipment safety. They include WARNINGS and CAUTIONS. B. Maintenance Data: These are servicing and maintenance instructions. C. By Local Regulation: The aircraft must have these placards and markings. When these types of placards are shown in Chapter 11, they are identified by (1).
A
有三种标牌和标记：A.安全数据：这些标牌和标记是用于飞行机组、客舱的，也用于设备安全。它们包括警告和注意事项。B.维护数据：这些是维修和保养说明。C.按当地的法规：飞机必须有这些标牌和标记。当C这类标牌出现在第11章中时它们会被标识为(1)。
B
有三种标牌和标记：A.安全数据：这些标牌和标记是用于飞行机组、客舱的，也用于设备安全。它们包括警告和注意事项。B.维护数据：这些是维修和保养说明。C.按航空器生产国（地区）法规：飞机必须有这些标牌和标记。当C这类标牌出现在第11章中时它们会被标识为(1)。
C
有三种标牌和标记：A.安全数据：这些标牌和标记是用于飞行机组、客舱的，也用于设备安全。它们包括警告和注意事项。B.维护数据：这些是维修和保养说明。C.按航空器运行地法规：飞机必须有这些标牌和标记。当C这类标牌出现在第11章中时它们会被标识为(1)。
答案解析
正确答案：A
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