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int a[2][3]={{1,2},{3,4},{5,6}}; int a[ ][3]={1,2,3,4,5,6}; int a[2][ ]={1,2,3,4,5,6}; int a[2][ ]={{1,2},{3,4}};
={x|1={x|x 2-2x-3≤0},则( ) A.(1,4)B.(3,4) (1,3) (1,2)U(3,4)
{1,2,3,6,7,8,9}和{3,4} {1,2,6,7,8,9}和{3,4} {1,2,3,6,7,8}和{2,3,4} {1,2,3,5,6,7,8}和{2,3,4}
intb[][2]=1,2,3,4,5,6,7; intb[3][5]=0,0,0; intb[][4]=1,2,3,4,5,6; intb[3][2]=(1,2),(3,4),(5,6);
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int b[][2]=1,2,3,4,5,6,7; int b[3][5]=0,0,0; int b[][4]=1,2,3,4,5,6; int b[3][2]=(1,2),(3,4) ,(5,6);