填空题
A.1,2,3,4,5,6,7,8,9,10, B.10,9,8,7,6,5,4,3,2,1, C.9,2,7,4,5,6,3,8,1,10, D.1,10,3,8,5,6,7,4,9,2,
A.i B.2*i-1 C.2*i+1 D.i+2