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单选题
襟翼由两个交流动力驱动组件（PDU）驱动，当其中一个失效，襟翼操作：The flaps are driven by two AC Power Drive Units (PDU) when one of them fails, flap operation:
A
不受影响。Is not affected
B
不再可用，襟翼会在上一个选择的位置保持静止。Is no longer available, flaps will remain stationary in last selected position
C
襟翼将以减速运转。Flaps will operate at a reduced speed
D
仅外侧部分会保持运转。Only the outer segments will remain operational.
答案解析
正确答案：C
