如果严格按照5min 焰火时间不应该算，算还是不算和数学无关取决于题目本意

来源: yddad 于 2016-01-22 08:05:32 [档案] [旧帖] [给我悄悄话] 阅读数 : 0 (0 bytes)

回答: they go off at the same time at 0, 30, 60, 90, 120, 150, 180, 2 由林吉于 2016-01-22 07:42:24

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