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④拖其衣裘：_____________________________________________________________________　

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(3)一词多义

①殆

②闻

③国

④故

(4)古今异义

①百川灌河

古义：__________________________________________________________________________　

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今义：__________________________________________________________________________　

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②至于北海

古义：__________________________________________________________________________　

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今义：__________________________________________________________________________　

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③东面而视

古义：__________________________________________________________________________