单项选择题

A guided missile consists basically of a warhead attached to a tube like body. A rocket or a jet engine may ______ the missile.

A．power
B．pull
C．compel
D．expel
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单项选择题
From the cheers and shouts of ______, I guessed that she was winning the race.
A．stimulus
B．heartening
C．encouragement
D．urging
单项选择题
The meeting was ______ over by the mayor to discuss the tax raise in the city.
A．presumed
B．propelled
C．presided
D．pricked
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