8一人晨练时,所走的径迹为如图(a)所示的半径为R的中国古代八卦图,中央的S形为两个直径为R的半圆.取向如图(b)所示.当他从A点出发沿曲线ABCOADC行进过程中,位于D点时,他通过的路程和位移
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![8一人晨练时,所走的径迹为如图(a)所示的半径为R的中国古代八卦图,中央的S形为两个直径为R的半圆.取向如图(b)所示.当他从A点出发沿曲线ABCOADC行进过程中,位于D点时,他通过的路程和位移](/uploads/image/z/6917231-47-1.jpg?t=8%E4%B8%80%E4%BA%BA%E6%99%A8%E7%BB%83%E6%97%B6%2C%E6%89%80%E8%B5%B0%E7%9A%84%E5%BE%84%E8%BF%B9%E4%B8%BA%E5%A6%82%E5%9B%BE%28a%29%E6%89%80%E7%A4%BA%E7%9A%84%E5%8D%8A%E5%BE%84%E4%B8%BAR%E7%9A%84%E4%B8%AD%E5%9B%BD%E5%8F%A4%E4%BB%A3%E5%85%AB%E5%8D%A6%E5%9B%BE%2C%E4%B8%AD%E5%A4%AE%E7%9A%84S%E5%BD%A2%E4%B8%BA%E4%B8%A4%E4%B8%AA%E7%9B%B4%E5%BE%84%E4%B8%BAR%E7%9A%84%E5%8D%8A%E5%9C%86%EF%BC%8E%E5%8F%96%E5%90%91%E5%A6%82%E5%9B%BE%28b%29%E6%89%80%E7%A4%BA%EF%BC%8E%E5%BD%93%E4%BB%96%E4%BB%8EA%E7%82%B9%E5%87%BA%E5%8F%91%E6%B2%BF%E6%9B%B2%E7%BA%BFABCOADC%E8%A1%8C%E8%BF%9B%E8%BF%87%E7%A8%8B%E4%B8%AD%2C%E4%BD%8D%E4%BA%8ED%E7%82%B9%E6%97%B6%2C%E4%BB%96%E9%80%9A%E8%BF%87%E7%9A%84%E8%B7%AF%E7%A8%8B%E5%92%8C%E4%BD%8D%E7%A7%BB)
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