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1800不是閏年2004和2012是閏年.西曆閏年的精確計算方法(按一回歸年365天5小時48分45.5秒)①、普通年能被4整除且不能被100整除的為閏年.(如2004年就是閏年,1901年不是閏年)②、世紀年能被400整除的是閏年.(…
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