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According to scientists, our mental abil...

According to scientists, our mental abilities begin to __________ from the age of 27 after reaching the highest level at 22.

A. differ       B. shrink     C. fail      D. decline

 

D 【解析】A. differ不同于;B. shrink增加;C. fail发展;D. decline下降。句意:根据科学研究,我们的记忆力在22岁到达顶峰研究从27岁就开始下降了。  
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