将1﹣﹣9这九个数填入右边的九宫格(三阶幻方)中.
解:因为:1+9=2+8=3+7=4+6=10;
按上述条件填出并调整可得到一个三阶幻方,其幻和为15.
幻方如下(答案不唯一):
食物腐败的主要原因是( )
— __________?
— He wants to join the swimming club.
The brown trousers _______ 70 dollars. And that white pair of trousers _______ 80 dollars.