下载APP
【单选题】
The thrust-to-weight ratio of rocket engines could reaches ____.
A.
30-40
B.
50-70
C.
80-120
D.
100-150
举报
参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【多选题】The advantages of rocket engine compared with aeroengine include: ____.
A.
The thrust is not affected by the flight attitude
B.
Larger thrust
C.
High thrust-to-weight ratio
D.
Self-contained combustion agent
【单选题】____ is a kind of the chemical energy rocket engines.
A.
Solar energy rocket engine
B.
Electric energy rocket engine
C.
Solid-liquid hybrid rocket engine
D.
Nuclear energy rocket engine
【多选题】Non-chemical rocket engines are generally accelerated to emit: ____.
A.
Hydrogen
B.
Helium
C.
Argon
D.
Xenon
【单选题】The most important part to control the thrust of the liquid rocket engine is the ____.
A.
Jet nozzle
B.
Propellant feeding system
C.
Propellant pump
D.
Flow control valve