词汇与结构The amount and pressure of the ________ air is regulated by a computer and outflow valves.
举一反三
- 词汇与结构Normally, pressurization problems are caused by a malfunctioning of the pressure outflow or the pressure regulating valves _______, which allows the air to escape out of the pressurized cabin.
- Diesel engine air start system check valves are opened by （） A: an air start cam B: cylinder compression pressure C: starting air pressure D: valve spring
- 词汇与结构 The lowest pressure occurs over the _________ surface of the wing, and the highest pressure is formed under the wing.
- The starting air system usually has （） to prevent starting if anything is not in order. A: stop valves B: interlocks C: non-return valves D: air vent
- 词汇与结构 Warm air is less dense than cool air, and _____ air is less dense than dry air.