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秒针从12走到3走了多少秒
更新时间: 2020-11-06 00:00:00  

秒针从12走到3走了15秒,秒针走一圈是60秒,表盘是分为12等份,从12到3是走了3等份,所以60*3/12=15秒。比如秒针从12走到6就是走了半圈,就是6等份,秒针从12走到8就是走了8等份,60*8/12=40秒。秒针是手表或钟上用以指示秒的针。

关键词: 秒针 多少

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