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秒针是哪一根

钟声. 钟声. 秒针是哪一根. 哪些钟表可以计量秒. 秒针走一格是1秒 秒针走一圈是60秒. 拨一拨你手上的钟面，你有什么发现？. 分针走1格，秒针走多少？ 秒针走1圈，分针走多少？. 1分 = 60秒. 钟表上显示的是多少秒？. 10点58分50秒. 1分钟有多长？. 钟表的历史. http://www.wcw2008.com/front/credit/index.asp.

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秒针是哪一根

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  1. 钟声 钟声

  2. 秒针是哪一根

  3. 哪些钟表可以计量秒 秒针走一格是1秒 秒针走一圈是60秒 拨一拨你手上的钟面，你有什么发现？

  4. 分针走1格，秒针走多少？ 秒针走1圈，分针走多少？ 1分 = 60秒

  5. 钟表上显示的是多少秒？ 10点58分50秒

  6. 1分钟有多长？

  7. 钟表的历史 http://www.wcw2008.com/front/credit/index.asp

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