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单选题
冲压空气涡轮在空中自动放出的条件
A
当飞机空速大于50节时，AC BUS1或AC BUS2失效
B
当飞机空速大于100节时，DC BUS1或AC BUS2失效
C
当飞机空速大于100节时，AC BUS1和AC BUS2失效
D
当飞机空速大于100节时，AC BUS2或AC ESS BUS失效
答案解析
正确答案：C
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