As is known to all, great scientific achievements may have positive effect on our life as well as society. A. /; a B. the; a C. the; / D. /, / 查看更多

 

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As is known to all, ______ great scientific achievements may have ______ positive effect on our life as well as society.  

A. /; a       B. the; a        C. the; /             D. /; /

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