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【单选题】
Advantages of solid rocket engines over liquid rocket engines are ____.
A.
Larger thrust
B.
r structure, more convenient to operate
C.
Higher specific impulse
D.
Longer working time
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【多选题】Solid rocket engines generally are using on: ____.
A.
Sounding rockets
B.
Air-to-air missiles
C.
Rocket boosters
D.
Main engine of space shuttle
【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
【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
相关题目：
【多选题】Solid rocket engines generally are using on: ____.
A.
Sounding rockets
B.
Air-to-air missiles
C.
Rocket boosters
D.
Main engine of space shuttle
【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
【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
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