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【简答题】
The professor will check the__ information in John's written report.
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举报参考答案：
举一反三
【多选题】The influences of wingtip trailing vortex are: ____.
A.
The efficiency of the airport
B.
The efficiency of aircraft’s take-off and landing
C.
The lift of the plane
D.
Increase the induced drag
【单选题】Which of following belongs to passive control in the noise control of aircraft? ____.
A.
Adopting fairings
B.
Blowing control
C.
Aspirating control
D.
Plasma micro jet.
【多选题】The main noise sources on the airframe includes: ____.
A.
Aerodynamic noises of high lift device
B.
Aerodynamic noises of landing gear
C.
Interference noises among the aircraft
D.
Jet noise of engine
相关题目：
【多选题】The influences of wingtip trailing vortex are: ____.
A.
The efficiency of the airport
B.
The efficiency of aircraft’s take-off and landing
C.
The lift of the plane
D.
Increase the induced drag
【单选题】Which of following belongs to passive control in the noise control of aircraft? ____.
A.
Adopting fairings
B.
Blowing control
C.
Aspirating control
D.
Plasma micro jet.
【多选题】The main noise sources on the airframe includes: ____.
A.
Aerodynamic noises of high lift device
B.
Aerodynamic noises of landing gear
C.
Interference noises among the aircraft
D.
Jet noise of engine
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