单项选择题


A．economic
B．economical
C．idea
D．ideal
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单项选择题
A．indirectlyB．instantlyC．inevitablyD．infinitely
A．indirectly
B．instantly
C．inevitably
D．infinitely
单项选择题
A．science-fictionB．man-madeC．newly-discoveredD．fresh-hand
A．science-fiction
B．man-made
C．newly-discovered
D．fresh-hand
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