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【单选题】
The specific impulse of chemical energy rocket engine can reach ____.
A.
3000 m/s
B.
5000 m/s
C.
8000 m/s
D.
10000 m/s
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【多选题】The performance indicators of a rocket engine refer to the engine's : ____.
A.
Thrust-weight ratio
B.
Thrust
C.
Impulse
D.
Specific impulse
【单选题】Which of the following engine has the highest specific impulse? ____.
A.
Liquid rocket engines
B.
Solid rocket engines
C.
Nuclear rocket engines
D.
Electrostatic rocket engine
相关题目：
【多选题】The performance indicators of a rocket engine refer to the engine's : ____.
A.
Thrust-weight ratio
B.
Thrust
C.
Impulse
D.
Specific impulse
【单选题】Which of the following engine has the highest specific impulse? ____.
A.
Liquid rocket engines
B.
Solid rocket engines
C.
Nuclear rocket engines
D.
Electrostatic rocket engine
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