单项选择题

The fuel of the continental missile is supposed to be ________ by this device,

A．ignited
B．lighted
C．fired
D．inspired
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单项选择题
If the world is to remain peaceful the utmost effort must be made by nations to limit local
A．collisions
B．combats
C．contradictions
D．conflicts
单项选择题
Satellite communications are so up-to-date that even when ________ in the middle of the Pacific, businessmen can contact their offices as if they were next door.
A．gliding
B．cruising
C．piloting
D．patrolling
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