VOA慢速英语2016.05.25 巧克力, minutes, cookies, difficult, chocolate

Rebecca949

Then researchers asked both groups to solve a difficult puzzle. The group that ate the radishes gave up on the puzzle after 9 minutes. The group that ate chocolate cookies worked twice as long on figuring out the puzzle.______________________________随后,研究人员让两组人员解决一个难题. 9分钟之后,进食萝卜的一组人员放弃了该难题.另外一组进食巧克力曲奇的人员则花费至少两倍长的时间解答难题._____________________________

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