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terminal-based
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单项选择题
A．Neither of the two types of rockets is very economical.B．The liquid-fuel rocket is best.C．Each type of rocket has certain advantages.D．The solid-fuel rocket is best.
A．Neither of the two types of rockets is very economical.
B．The liquid-fuel rocket is best.
C．Each type of rocket has certain advantages.
D．The solid-fuel rocket is best.
单项选择题
A．A meeting room.B．A library.C．A shop.D．A toilet.
A．A meeting room.
B．A library.
C．A shop.
D．A toilet.
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