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【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
举报
参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】A single collection of ants can generally be used for both taxonomic and ecological purposes
A.
TRUE
B.
FALSE
C.
NOT GIVEN
【多选题】Electric rocket engines, according to the different ways of accelerating working medium, can be divided into: ____.
A.
Electrothermal propulsion
B.
Electric current propulsion
C.
Electrostatic propulsion
D.
Electromagnetic propulsion