修改语段中五个画线句子。     
①英国科学家近期对山雀的行为进行探索，发现这些田鼠般大小的鸟，②能把为过冬而储蓄的种子牢记在心里，③尽管是5处10处，甚至更多的地方，④它们均能想到这些秘密的仓库。⑤通过对燕雀、金丝雀的研究中，科学家们听到他们每年春天的歌，“曲目”同往年完全不 同，可见，鸟类的大脑有特殊的学习记忆能力。  
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【考点】病句辨析

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