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单项选择题

Scientific research results can now be quickly_______to factory production.

A．used
B．applied
C．tried
D．practiced
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热门试题

单项选择题A．whatB．whichC．thatD．other

A．what
B．which
C．that
D．other

单项选择题That young man still denies ______ the fire behind the store.

A．to start
B．having started
C．start
D．to have started