词汇与结构Hot trim air from the bleed air system is added to the pack conditioned air to _____the temperature in each zone.
A: increase
B: obtain
C: evaluate
D: control
A: increase
B: obtain
C: evaluate
D: control
举一反三
- 4. From the control tower, air traffic controllers coordinate aircraft movement both ________ and on the ground. A: on the air B: in the air C: at the air D: of the air
- 词汇与结构 This relationship between temperature, altitude, and air density can be expressed as a _______ altitude, or the altitude in the International Standard Atmosphere at which the air density would be equal to the actual air density.
- 词汇与结构 Warm air is less dense than cool air, and _____ air is less dense than dry air.
- Which process results in the increase in entropy of the<br/>universe? ( ) A: the cooling of a hot cup of coffee in room temperature air B: the evaporation of water from a desk at room temperature C: the melting of snow above 0 °C D: all of the above
- 词汇与结构 Air traffic control units use the term “______” when they are assigning an aircraft a transponder code.