单项选择题
A.1 3 5 7 9 B.9 7 5 3 1 C.1 2 3 4 5 6 7 8 9 10 D.10 9 8 7 6 5 4 3 2 1
A.abcd1234 B.a1b2c3d4 C.a1b1c1d1 D.1234abcd
A.0 B.12 C.Str(Z) D.没有显示