题目内容

词汇与结构Typically, compressed air is bled from at least two propulsion engines each system being fully ________.

A. filled
B. extra
C. refilled
D. redundant

查看答案

搜索结果不匹配？点我反馈

更多问题

词汇与结构Compressed air is also _____from the Auxiliary Power Unit, if fitted, in the event of an emergency and for cabin air supply on the ground before the main engines are started.

A. obtained
B. gained
C. received
D. delivered

词汇与结构All exhaust air is _____to atmosphere via a valve, usually at the rear of the fuselage.

A. dimmed
B. dumped
C. doubled
D. diverted

词汇与结构This valve controls the cabin pressure and also ______as a safety relief.

A. takes
B. makes
C. acts
D. speaks

词汇与结构The pilot can _____the cabin pressure at will through the outflow valve.

A. alter
B. choose
C. select
D. switch