- 問題詳情:Canadasharesthelongestinternationalborder(邊界)intheworldwiththeUSA,whichis8,891kmlong.ThelongestpartoftheborderissharedwiththeUSstate,Alaska,anditisabout2,475kmlong.HereismoreinformationaboutCanada.Geography★thelargestwaterfalls,NiagaraFall...
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