the author brings her children to visit a nursing home and
A.
this is the first time the children pay such a visit
B.
this is one of the rare visits there by the children
C.
this is one of the many visits there by the children
D.
this is the last visit by the children
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【简答题】下面程序可求出矩阵的两条对角线上的元素之和,请填空。 main() { int a[3][3]={1,3,6,7,9,11,14,15,17},sum1=0,sum2=0,i,j; for(i=0;i<3;i++) for (j=0;j<3;j++) if (i==j) sum1=sum1+a[i][j]; for(i=0;i<3;i++) for(j=2; ;j--) if ...