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Asisknowntous,theyear2016hasoneextradayinit—February29t...
问题详情:Asisknowntous,theyear2016hasoneextradayinit—February29th.Thisisbecauseit’s 61 wecall“aleapyear”.Everyfouryears,theyearhas366daysin 62 insteadof365.Itiscalledaleapyearbecausehundredsofy...