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单选题
＇L BLEED DUCT＇警告信息和音响警告＇Bleed Air Duct＇指示：＇L BLEED DUCT＇ warning message and aural warning＇Bleed Air Duct＇ indicates:
A
防冰和漏气探测器（AILC）探测到左侧引气管道引气泄露。 A bleed air leak detected by AILC in the left bleed ducting.
B
防冰和漏气探测器（AILC）探测到右侧引气管道引气泄露。 A bleed air leak detected by AILC in the right bleed ducting.
C
引气泄露后引气关闭且系统未选择关闭。Bleed shutdown after bleed leak and system not selected off.
D
在通电自检测试中（PBIT），左引气管路的漏气双探测环路失效。 Loss of both leak detection loops in left bleed ducting during PBIT.
答案解析
正确答案：A
