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【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
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】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
【单选题】V-2 missile is a kind of ____ missile.
A.
Air-supported
B.
Air-to-ground
C.
Ground-to-air
D.
Ballistic
