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三连环将1、2、3、4、5、6填入下面“三连环”的空格内,使每一个圆环上的三个数之和都得9。“三连环”图中的部分数已填,其他的数你来试一试吧?
Three links 1,2,3,4,5,6 into the following “three-link ” space, so that each of the three rings on the sum of 9. “Three-link ” part of the figure has been filled in, the other number you try it?