【单选题】We have a responsibility to ensure our nation's continued prosperity and the most sensible way to do this is by investment in basic scientific research.
A．effective
B．efficient
C．significant
D．reasonable
【单选题】We have a responsibility to ensure our nation's continued prosperity and the most sensible way to do this is by investment in basic scientific research.
A．effective
B．efficient
C．significant
D．reasonable
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