在一天的24小时之中,时钟的时针、分针和秒针完全重合在一起的时候有几次?都分别是什么时间?你怎样算出来的?
posted @ 2014-11-23 03:14
posted @ 2014-11-23 03:14
posted @ 2014-05-19 20:59
posted @ 2014-05-19 20:54
posted @ 2013-11-25 18:15
posted @ 2013-11-25 16:34
posted @ 2013-11-24 16:08
posted @ 2013-11-24 01:13
posted @ 2013-11-24 01:09
posted @ 2013-11-24 01:07
posted @ 2013-11-24 00:55
posted @ 2013-11-24 00:43
posted @ 2013-11-24 00:35