题目内容
(请给出正确答案)
[单选题]
【单选题】Lesson Two Text A Vocabulary Multiple choices-11 11.APU's compressor provides ______for engine starting and for maintaining cabin air-conditioning during ground operations
A.bleed air
B.pressurization
C.ventilation
D.fresh air
提问人:网友superlyb521
发布时间:2022-01-07