In the figure above, segments PQ and PR are each parallel to one of the rectangular coordinate axes. What is the sum of the coordinates of point P ? (1) The x-coordinate of point Q is -1. (2) The y-coordinate of point R is 1. 不知道图看不看得见= =可以看附件的图 想问问什么不能是pq平行于x轴,pr平行于y轴,这样即是两个条件都用也不确定答案? 是因为给出的图规定了吗?作者: candybecky 时间: 2012-8-22 12:26
upup作者: candybecky 时间: 2012-8-25 21:24
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