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【单选题】
The compression of air is finished in the ____ of ramjet.
A.
Intake ducts
B.
Compressor
C.
Turbines
D.
Nozzle
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举报参考答案：
举一反三
【多选题】The characteristics of ramjet includes: ____.
A.
Complex structure
B.
Inefficient when the aircraft is flying at low speed
C.
Good intake and compression performance when the aircraft is flying at low speed
D.
Usually used in combination with other types of engines
【多选题】The power source of electric power device mainly comes from: ____.
A.
Solar cell
B.
Battery
C.
Wind energy battery
D.
Fuel cell
相关题目：
【多选题】The characteristics of ramjet includes: ____.
A.
Complex structure
B.
Inefficient when the aircraft is flying at low speed
C.
Good intake and compression performance when the aircraft is flying at low speed
D.
Usually used in combination with other types of engines
【多选题】The power source of electric power device mainly comes from: ____.
A.
Solar cell
B.
Battery
C.
Wind energy battery
D.
Fuel cell
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