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不是.一般規定一個四位數的年份如果能被4整除,那麼就是閏年.可是由於每四年一個閏年又太多了,與實際不符,所以規定十位和個位都是0的年份必須滿足能被400整除,才是閏年.顯然1900這個数字不能被400整除啊,所以它就不是閏年.
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