?8548.(1) Usually bleed air from a gas-turbine engine compressor can be safely used for cabin pressurization.(2) Independent cabin condition air machines (air cycle machine) can be powered by bleed air from an aircraft turbine engine compressor.Regarding the above statements,
发布于 2021-02-18 22:11:50
【单选题】 A ?only No.1 is true. B ?only No.2 is true. C ?both No.1 and No.2 are true.