申请保密资格的单位应当在（）内未发生泄密事件。

【说明】 以下程序为求行列式X(5,5)的值S。 【Visual Basic代码】 Private Function col ( byval x ( 5,5 ) as integer ) as long dim fesult as long dim temp as long dim I as integer dim j as integer dim k as imeger result = 0 for I = to 5 (1) for j = 1 to 5 if I+j＞6 then k= ( 1+j ) mod 5 else k=1 endif temp=temp*x ( k,j ) (2) result= (3) (4) (5) End function