A、energy conservative
B、energy conservation
C、energy conserving
D、energetic conservation
A、动量矩守恒,机械能守恒; Conservation of moment of momentum; Conservation of mechanical energy;
B、动量守恒,机械能守恒; Conservation of momentum; Conservation of mechanical energy;
C、0
D、0
A.first
B.second
C.third
D.--
The possibility of energy conservation is mentioned (in paragraph 3) in order to ______.
A.preempt and refute a possible objection to the author's position
B.support directly the central thesis of the passage
C.minimize the significance of a contradiction in the passage
D.prove that such measures are ineffective and counterproductive
A.first
B.second
C.third
D.--
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