1.3.2.1.1.2.1.1线段中点的坐标公式
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Earned Point(s): 0 of 0, (0) 1.3.2.1.1.2.1.1.002 已知A(2,3,-4),B(-4,-3,-2),则线段AB中点C的坐标为 ( , , ) 1.3.2.1.1.2.1.1.003 已知C(2,-1,-2),D(0,-1,4),则线段CD中点O的坐标为 ( , , ) 1.3.2.1.1.2.1.1.004 已知M(1,-1,1),N(2,1,-1),则线段MN中点P的坐标为 ( , , )
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